1234

1234 is a four-digit natural number in decimal notation. It lies between 1233 and 1235, and its digits—1, 2, 3, and 4—form a strictly increasing sequence.

Mathematically, 1234 is even and composite. Its prime factorization is 2 × 617; since 617 is prime, the number has four positive divisors: 1, 2, 617, and 1234. Therefore, 1234 is a semiprime, being the product of two primes.

In common representations, 1234 is MCCXXXIV in Roman numerals; in binary it is 10011010010, and in hexadecimal it is 4D2.

In culture and computing, 1234 is often used as a simple example number or as a default PIN because its digits are easy to remember. It appears in puzzles, programming tutorials, and numerical demonstrations as a straightforward, recognizable four-digit value.