25604947 has 4 divisors (see below), whose sum is σ = 25616416. Its totient is φ = 25593480.

The previous prime is 25604939. The next prime is 25604959. The reversal of 25604947 is 74940652.

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 25604947 - 2³ = 25604939 is a prime.

It is a super-2 number, since 2×25604947² = 1311226621745618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25604147) 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, 1179 + ... + 7252.

It is an arithmetic number, because the mean of its divisors is an integer number (6404104).

Almost surely, 2^25604947 is an apocalyptic number.

25604947 is a deficient number, since it is larger than the sum of its proper divisors (11469).

25604947 is an equidigital number, since it uses as much as digits as its factorization.

25604947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11468.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 25604947 is about 5060.1331010162. The cubic root of 25604947 is about 294.7415029433.

The spelling of 25604947 in words is "twenty-five million, six hundred four thousand, nine hundred forty-seven".