25455987 has 18 divisors (see below), whose sum is σ = 39063908. Its totient is φ = 15970752.

The previous prime is 25455967. The next prime is 25456019. The reversal of 25455987 is 78955452.

25455987 is a `hidden beast` number, since 2 + 54 + 5 + 598 + 7 = 666.

It is not a de Polignac number, because 25455987 - 2¹⁸ = 25193843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25455967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2293 + ... + 7494.

Almost surely, 2^25455987 is an apocalyptic number.

25455987 is a deficient number, since it is larger than the sum of its proper divisors (13607921).

25455987 is a wasteful number, since it uses less digits than its factorization.

25455987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9827 (or 9807 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 25455987 is about 5045.3926507260. The cubic root of 25455987 is about 294.1688257066.

The spelling of 25455987 in words is "twenty-five million, four hundred fifty-five thousand, nine hundred eighty-seven".