25712157 has 4 divisors (see below), whose sum is σ = 34282880. Its totient is φ = 17141436.

The previous prime is 25712147. The next prime is 25712161. The reversal of 25712157 is 75121752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25712157 - 2¹⁵ = 25679389 is a prime.

It is a super-2 number, since 2×25712157² = 1322230035185298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25712117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4285357 + ... + 4285362.

It is an arithmetic number, because the mean of its divisors is an integer number (8570720).

Almost surely, 2^25712157 is an apocalyptic number.

It is an amenable number.

25712157 is a deficient number, since it is larger than the sum of its proper divisors (8570723).

25712157 is an equidigital number, since it uses as much as digits as its factorization.

25712157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570722.

The product of its digits is 4900, while the sum is 30.

The square root of 25712157 is about 5070.7156299678. The cubic root of 25712157 is about 295.1522990286.

The spelling of 25712157 in words is "twenty-five million, seven hundred twelve thousand, one hundred fifty-seven".