25252857 has 32 divisors (see below), whose sum is σ = 43580160. Its totient is φ = 14152320.

The previous prime is 25252849. The next prime is 25252867. The reversal of 25252857 is 75825252.

It is not a de Polignac number, because 25252857 - 2³ = 25252849 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25252847) 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 31 ways as a sum of consecutive naturals, for example, 8757 + ... + 11277.

It is an arithmetic number, because the mean of its divisors is an integer number (1361880).

Almost surely, 2^25252857 is an apocalyptic number.

25252857 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25252857 is a deficient number, since it is larger than the sum of its proper divisors (18327303).

25252857 is a wasteful number, since it uses less digits than its factorization.

25252857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590 (or 2584 counting only the distinct ones).

The product of its digits is 56000, while the sum is 36.

The square root of 25252857 is about 5025.2220846446. Note that the first 3 decimals coincide. The cubic root of 25252857 is about 293.3842799194.

The spelling of 25252857 in words is "twenty-five million, two hundred fifty-two thousand, eight hundred fifty-seven".