25687413 has 6 divisors (see below), whose sum is σ = 37104054. Its totient is φ = 17124936.

The previous prime is 25687393. The next prime is 25687423. The reversal of 25687413 is 31478652.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 9381969 = 4038^2 + 3063^2 .

It is not a de Polignac number, because 25687413 - 2⁸ = 25687157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25687423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1427070 + ... + 1427087.

It is an arithmetic number, because the mean of its divisors is an integer number (6184009).

Almost surely, 2^25687413 is an apocalyptic number.

It is an amenable number.

25687413 is a deficient number, since it is larger than the sum of its proper divisors (11416641).

25687413 is a wasteful number, since it uses less digits than its factorization.

25687413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854163 (or 2854160 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 25687413 is about 5068.2751503840. The cubic root of 25687413 is about 295.0575890633.

The spelling of 25687413 in words is "twenty-five million, six hundred eighty-seven thousand, four hundred thirteen".