1256465200 has 30 divisors (see below), whose sum is σ = 3018658604. Its totient is φ = 502585920.

The previous prime is 1256465159. The next prime is 1256465201. The reversal of 1256465200 is 25646521.

It is a super-2 number, since 2×1256465200² = 3157409597622080000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1256465201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1570182 + ... + 1570981.

Almost surely, 2^1256465200 is an apocalyptic number.

1256465200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1256465200 is an abundant number, since it is smaller than the sum of its proper divisors (1762193404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256465200 is a wasteful number, since it uses less digits than its factorization.

1256465200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141181 (or 3141170 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1256465200 is about 35446.6528744253. The cubic root of 1256465200 is about 1079.0713324614.

The spelling of 1256465200 in words is "one billion, two hundred fifty-six million, four hundred sixty-five thousand, two hundred".