25116857 has 4 divisors (see below), whose sum is σ = 25143696. Its totient is φ = 25090020.

The previous prime is 25116829. The next prime is 25116877. The reversal of 25116857 is 75861152.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25116857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25116877) 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, 11963 + ... + 13904.

It is an arithmetic number, because the mean of its divisors is an integer number (6285924).

Almost surely, 2^25116857 is an apocalyptic number.

It is an amenable number.

25116857 is a deficient number, since it is larger than the sum of its proper divisors (26839).

25116857 is an equidigital number, since it uses as much as digits as its factorization.

25116857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26838.

The product of its digits is 16800, while the sum is 35.

The square root of 25116857 is about 5011.6720762636. The cubic root of 25116857 is about 292.8566550628.

The spelling of 25116857 in words is "twenty-five million, one hundred sixteen thousand, eight hundred fifty-seven".