1253572857 has 12 divisors (see below), whose sum is σ = 1822709824. Its totient is φ = 830179800.

The previous prime is 1253572849. The next prime is 1253572883. The reversal of 1253572857 is 7582753521.

1253572857 is a `hidden beast` number, since 1 + 25 + 3 + 572 + 8 + 57 = 666.

It is not a de Polignac number, because 1253572857 - 2³ = 1253572849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253572897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 459853 + ... + 462570.

Almost surely, 2^1253572857 is an apocalyptic number.

It is an amenable number.

1253572857 is a deficient number, since it is larger than the sum of its proper divisors (569136967).

1253572857 is a wasteful number, since it uses less digits than its factorization.

1253572857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922580 (or 922577 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 1253572857 is about 35405.8308333529. The cubic root of 1253572857 is about 1078.2427003246.

The spelling of 1253572857 in words is "one billion, two hundred fifty-three million, five hundred seventy-two thousand, eight hundred fifty-seven".