25487138 has 16 divisors (see below), whose sum is σ = 39137280. Its totient is φ = 12445056.

The previous prime is 25487123. The next prime is 25487141. The reversal of 25487138 is 83178452.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14495 + ... + 16157.

It is an arithmetic number, because the mean of its divisors is an integer number (2446080).

Almost surely, 2^25487138 is an apocalyptic number.

25487138 is a deficient number, since it is larger than the sum of its proper divisors (13650142).

25487138 is a wasteful number, since it uses less digits than its factorization.

25487138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841.

The product of its digits is 53760, while the sum is 38.

The square root of 25487138 is about 5048.4787807814. The cubic root of 25487138 is about 294.2887702172.

The spelling of 25487138 in words is "twenty-five million, four hundred eighty-seven thousand, one hundred thirty-eight".