25552987 has 4 divisors (see below), whose sum is σ = 25573680. Its totient is φ = 25532296.

The previous prime is 25552951. The next prime is 25552997. The reversal of 25552987 is 78925552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25552987 - 2²³ = 17164379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25552937) 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 3 ways as a sum of consecutive naturals, for example, 8368 + ... + 11005.

It is an arithmetic number, because the mean of its divisors is an integer number (6393420).

Almost surely, 2^25552987 is an apocalyptic number.

25552987 is a deficient number, since it is larger than the sum of its proper divisors (20693).

25552987 is a wasteful number, since it uses less digits than its factorization.

25552987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20692.

The product of its digits is 252000, while the sum is 43.

The square root of 25552987 is about 5054.9962413438. The cubic root of 25552987 is about 294.5419954083.

The spelling of 25552987 in words is "twenty-five million, five hundred fifty-two thousand, nine hundred eighty-seven".