25831457 has 4 divisors (see below), whose sum is σ = 26087316. Its totient is φ = 25575600.

The previous prime is 25831451. The next prime is 25831459. The reversal of 25831457 is 75413852.

It is a happy number.

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 10962721 + 14868736 = 3311^2 + 3856^2 .

It is a cyclic number.

It is not a de Polignac number, because 25831457 - 2⁴ = 25831441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25831451) 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, 127778 + ... + 127979.

It is an arithmetic number, because the mean of its divisors is an integer number (6521829).

Almost surely, 2^25831457 is an apocalyptic number.

It is an amenable number.

25831457 is a deficient number, since it is larger than the sum of its proper divisors (255859).

25831457 is a wasteful number, since it uses less digits than its factorization.

25831457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255858.

The product of its digits is 33600, while the sum is 35.

The square root of 25831457 is about 5082.4656417924. The cubic root of 25831457 is about 295.6080801923.

The spelling of 25831457 in words is "twenty-five million, eight hundred thirty-one thousand, four hundred fifty-seven".