1057646725 has 18 divisors (see below), whose sum is σ = 1318757174. Its totient is φ = 841444800.

The previous prime is 1057646717. The next prime is 1057646767. The reversal of 1057646725 is 5276467501.

It can be written as a sum of positive squares in 9 ways, for example, as 1039482081 + 18164644 = 32241^2 + 4262^2 .

It is not a de Polignac number, because 1057646725 - 2³ = 1057646717 is a prime.

It is a super-2 number, since 2×1057646725² = 2237233189806451250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2512015 + ... + 2512435.

Almost surely, 2^1057646725 is an apocalyptic number.

It is an amenable number.

1057646725 is a deficient number, since it is larger than the sum of its proper divisors (261110449).

1057646725 is an frugal number, since it uses more digits than its factorization.

1057646725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 1057646725 is about 32521.4809779629. The cubic root of 1057646725 is about 1018.8577258209.

The spelling of 1057646725 in words is "one billion, fifty-seven million, six hundred forty-six thousand, seven hundred twenty-five".