1234 (number)

This article is about the number 1234. For the year, see 1234.
← 1233 1234 1235 →
Cardinalone thousand two hundred thirty-four
Ordinal1234th
(one thousand two hundred thirty-fourth)
Factorization2 × 617
Greek numeral,ΑΣΛΔ´
Roman numeralMCCXXXIV
Binary100110100102
Ternary12002013
Senary54146
Octal23228
Duodecimal86A12
Hexadecimal4D216

1234 is the natural number following 1233, and preceding 1235. It has two distinct prime factors, 2 and 617, making it a squarefree semiprime.[1] It is the number of independent vertex sets in a 4×4 square grid, or equivalently, the number of distinct 4×4 binary matrices in which no two adjacent elements are both equal to 1.[2]

A 2012 study of frequently-used personal identification numbers (PIN) found that, among 4-digit PIN codes, 1234 is the most frequently chosen.[3]

  1. ^ Sloane, N. J. A. (ed.). "Sequence A001358". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. ^ Sloane, N. J. A. (ed.). "Sequence A006506". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^ Berry, N. (September 3, 2012). "PIN analysis". Data Genetics. As cited by Nisbet, Alastair; Kim, Maria (December 2016). "An analysis of chosen alarm code pin numbers & their weakness against a modified brute force attack". In Johnstone, M. (ed.). The Proceedings of 14th Australian Information Security Management Conference. Perth, Australia: Edith Cowan University. pp. 21–29. doi:10.4225/75/58a69fd2a8b03.{{cite conference}}: CS1 maint: date and year (link)