25250857 has 4 divisors (see below), whose sum is σ = 25290180. Its totient is φ = 25211536.

The previous prime is 25250839. The next prime is 25250887. The reversal of 25250857 is 75805252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4648336 + 20602521 = 2156^2 + 4539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25250857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25250887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18682 + ... + 19987.

It is an arithmetic number, because the mean of its divisors is an integer number (6322545).

Almost surely, 2^25250857 is an apocalyptic number.

It is an amenable number.

25250857 is a deficient number, since it is larger than the sum of its proper divisors (39323).

25250857 is an equidigital number, since it uses as much as digits as its factorization.

25250857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39322.

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 25250857 is about 5025.0230845241. The cubic root of 25250857 is about 293.3765344717.

The spelling of 25250857 in words is "twenty-five million, two hundred fifty thousand, eight hundred fifty-seven".