1256204672 has 16 divisors (see below), whose sum is σ = 2502595500. Its totient is φ = 628102272.

The previous prime is 1256204671. The next prime is 1256204713. The reversal of 1256204672 is 2764026521.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256204671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4906922 + ... + 4907177.

Almost surely, 2^1256204672 is an apocalyptic number.

It is an amenable number.

1256204672 is a deficient number, since it is larger than the sum of its proper divisors (1246390828).

1256204672 is an frugal number, since it uses more digits than its factorization.

1256204672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9814113 (or 9814101 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 1256204672 is about 35442.9777530049. The cubic root of 1256204672 is about 1078.9967455094.

The spelling of 1256204672 in words is "one billion, two hundred fifty-six million, two hundred four thousand, six hundred seventy-two".