25566495 has 32 divisors (see below), whose sum is σ = 43507200. Its totient is φ = 12783744.

The previous prime is 25566491. The next prime is 25566523. The reversal of 25566495 is 59466552.

It is not a de Polignac number, because 25566495 - 2² = 25566491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25566491) 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 31 ways as a sum of consecutive naturals, for example, 30654 + ... + 31476.

It is an arithmetic number, because the mean of its divisors is an integer number (1359600).

Almost surely, 2^25566495 is an apocalyptic number.

25566495 is a deficient number, since it is larger than the sum of its proper divisors (17940705).

25566495 is a wasteful number, since it uses less digits than its factorization.

25566495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959.

The product of its digits is 324000, while the sum is 42.

The square root of 25566495 is about 5056.3321686772. The cubic root of 25566495 is about 294.5938872204.

The spelling of 25566495 in words is "twenty-five million, five hundred sixty-six thousand, four hundred ninety-five".