25072257 has 16 divisors (see below), whose sum is σ = 38331392. Its totient is φ = 14279760.

The previous prime is 25072253. The next prime is 25072261. The reversal of 25072257 is 75227052.

It is an interprime number because it is at equal distance from previous prime (25072253) and next prime (25072261).

It is not a de Polignac number, because 25072257 - 2² = 25072253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25072253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5148 + ... + 8754.

It is an arithmetic number, because the mean of its divisors is an integer number (2395712).

Almost surely, 2^25072257 is an apocalyptic number.

It is an amenable number.

25072257 is a deficient number, since it is larger than the sum of its proper divisors (13259135).

25072257 is a wasteful number, since it uses less digits than its factorization.

25072257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 25072257 is about 5007.2204864575. The cubic root of 25072257 is about 292.6832105178.

The spelling of 25072257 in words is "twenty-five million, seventy-two thousand, two hundred fifty-seven".