1256404252 has 12 divisors (see below), whose sum is σ = 2200771720. Its totient is φ = 627612336.

The previous prime is 1256404249. The next prime is 1256404271. The reversal of 1256404252 is 2524046521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142638 + ... + 151189.

Almost surely, 2^1256404252 is an apocalyptic number.

It is an amenable number.

1256404252 is a deficient number, since it is larger than the sum of its proper divisors (944367468).

1256404252 is a wasteful number, since it uses less digits than its factorization.

1256404252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294900 (or 294898 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 1256404252 is about 35445.7931495403. The cubic root of 1256404252 is about 1079.0538844910.

The spelling of 1256404252 in words is "one billion, two hundred fifty-six million, four hundred four thousand, two hundred fifty-two".