1256044025 has 12 divisors (see below), whose sum is σ = 1559063532. Its totient is φ = 1003823040.

The previous prime is 1256043967. The next prime is 1256044033. The reversal of 1256044025 is 5204406521.

It can be written as a sum of positive squares in 6 ways, for example, as 638471824 + 617572201 = 25268^2 + 24851^2 .

It is not a de Polignac number, because 1256044025 - 2⁸ = 1256043769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 527 + ... + 50123.

It is an arithmetic number, because the mean of its divisors is an integer number (129921961).

Almost surely, 2^1256044025 is an apocalyptic number.

It is an amenable number.

1256044025 is a deficient number, since it is larger than the sum of its proper divisors (303019507).

1256044025 is a wasteful number, since it uses less digits than its factorization.

1256044025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50620 (or 50615 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1256044025 is about 35440.7114065167. The cubic root of 1256044025 is about 1078.9507484985.

The spelling of 1256044025 in words is "one billion, two hundred fifty-six million, forty-four thousand, twenty-five".