25381287 has 12 divisors (see below), whose sum is σ = 37074960. Its totient is φ = 16730208.

The previous prime is 25381273. The next prime is 25381319. The reversal of 25381287 is 78218352.

It is not a de Polignac number, because 25381287 - 2⁴ = 25381271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25381247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15043 + ... + 16644.

It is an arithmetic number, because the mean of its divisors is an integer number (3089580).

Almost surely, 2^25381287 is an apocalyptic number.

25381287 is a deficient number, since it is larger than the sum of its proper divisors (11693673).

25381287 is a wasteful number, since it uses less digits than its factorization.

25381287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31782 (or 31779 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 25381287 is about 5037.9844183959. The cubic root of 25381287 is about 293.8807999354.

The spelling of 25381287 in words is "twenty-five million, three hundred eighty-one thousand, two hundred eighty-seven".