25281087 has 16 divisors (see below), whose sum is σ = 36919680. Its totient is φ = 15292512.

The previous prime is 25281079. The next prime is 25281097. The reversal of 25281087 is 78018252.

It is not a de Polignac number, because 25281087 - 2³ = 25281079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25281017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3193 + ... + 7794.

It is an arithmetic number, because the mean of its divisors is an integer number (2307480).

Almost surely, 2^25281087 is an apocalyptic number.

25281087 is a deficient number, since it is larger than the sum of its proper divisors (11638593).

25281087 is a wasteful number, since it uses less digits than its factorization.

25281087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11062.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 25281087 is about 5028.0301311746. The cubic root of 25281087 is about 293.4935633154.

The spelling of 25281087 in words is "twenty-five million, two hundred eighty-one thousand, eighty-seven".