25665472 has 56 divisors (see below), whose sum is σ = 59253120. Its totient is φ = 10801920.

The previous prime is 25665469. The next prime is 25665473. The reversal of 25665472 is 27456652.

It is a tau number, because it is divible by the number of its divisors (56).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25665473) 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 7 ways as a sum of consecutive naturals, for example, 25947 + ... + 26917.

Almost surely, 2^25665472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25665472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29626560).

25665472 is an abundant number, since it is smaller than the sum of its proper divisors (33587648).

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

25665472 is an equidigital number, since it uses as much as digits as its factorization.

25665472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1039 counting only the distinct ones).

The product of its digits is 100800, while the sum is 37.

The square root of 25665472 is about 5066.1101448745. The cubic root of 25665472 is about 294.9735569518.

The spelling of 25665472 in words is "twenty-five million, six hundred sixty-five thousand, four hundred seventy-two".