25947564 has 12 divisors (see below), whose sum is σ = 60544344. Its totient is φ = 8649184.

The previous prime is 25947557. The next prime is 25947569. The reversal of 25947564 is 46574952.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (25947569) 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, 1081137 + ... + 1081160.

It is an arithmetic number, because the mean of its divisors is an integer number (5045362).

Almost surely, 2^25947564 is an apocalyptic number.

It is an amenable number.

25947564 is an abundant number, since it is smaller than the sum of its proper divisors (34596780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25947564 is a wasteful number, since it uses less digits than its factorization.

25947564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162304 (or 2162302 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 25947564 is about 5093.8751457019. The cubic root of 25947564 is about 296.0503171096.

The spelling of 25947564 in words is "twenty-five million, nine hundred forty-seven thousand, five hundred sixty-four".