25610987 has 4 divisors (see below), whose sum is σ = 25621680. Its totient is φ = 25600296.

The previous prime is 25610971. The next prime is 25611013. The reversal of 25610987 is 78901652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25610987 - 2⁴ = 25610971 is a prime.

It is a super-2 number, since 2×25610987² = 1311845310228338, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25610987.

It is not an unprimeable number, because it can be changed into a prime (25610087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89 + ... + 7157.

It is an arithmetic number, because the mean of its divisors is an integer number (6405420).

Almost surely, 2^25610987 is an apocalyptic number.

25610987 is a deficient number, since it is larger than the sum of its proper divisors (10693).

25610987 is an equidigital number, since it uses as much as digits as its factorization.

25610987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10692.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 25610987 is about 5060.7298880695. The cubic root of 25610987 is about 294.7646768338.

The spelling of 25610987 in words is "twenty-five million, six hundred ten thousand, nine hundred eighty-seven".