25572537 has 32 divisors (see below), whose sum is σ = 40448000. Its totient is φ = 15921360.

The previous prime is 25572517. The next prime is 25572541. The reversal of 25572537 is 73527552.

It is a happy number.

25572537 is a `hidden beast` number, since 2 + 55 + 72 + 537 = 666.

It is not a de Polignac number, because 25572537 - 2⁷ = 25572409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25572517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40212 + ... + 40842.

It is an arithmetic number, because the mean of its divisors is an integer number (1264000).

Almost surely, 2^25572537 is an apocalyptic number.

25572537 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25572537 is a deficient number, since it is larger than the sum of its proper divisors (14875463).

25572537 is a wasteful number, since it uses less digits than its factorization.

25572537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 732 counting only the distinct ones).

The product of its digits is 73500, while the sum is 36.

The square root of 25572537 is about 5056.9296020411. The cubic root of 25572537 is about 294.6170920186.

The spelling of 25572537 in words is "twenty-five million, five hundred seventy-two thousand, five hundred thirty-seven".