25157285 has 16 divisors (see below), whose sum is σ = 31653504. Its totient is φ = 19157952.

The previous prime is 25157281. The next prime is 25157291. The reversal of 25157285 is 58275152.

25157285 = 79² + 80² + ... + 423².

It is a cyclic number.

It is not a de Polignac number, because 25157285 - 2² = 25157281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25157281) 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, 32159 + ... + 32931.

It is an arithmetic number, because the mean of its divisors is an integer number (1978344).

Almost surely, 2^25157285 is an apocalyptic number.

It is an amenable number.

25157285 is a deficient number, since it is larger than the sum of its proper divisors (6496219).

25157285 is a wasteful number, since it uses less digits than its factorization.

25157285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

The product of its digits is 28000, while the sum is 35.

The square root of 25157285 is about 5015.7038389442. The cubic root of 25157285 is about 293.0136978302.

The spelling of 25157285 in words is "twenty-five million, one hundred fifty-seven thousand, two hundred eighty-five".