25621772 has 24 divisors (see below), whose sum is σ = 49239120. Its totient is φ = 11568960.

The previous prime is 25621763. The next prime is 25621787. The reversal of 25621772 is 27712652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5054 + ... + 8762.

It is an arithmetic number, because the mean of its divisors is an integer number (2051630).

Almost surely, 2^25621772 is an apocalyptic number.

25621772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25621772 is a deficient number, since it is larger than the sum of its proper divisors (23617348).

25621772 is a wasteful number, since it uses less digits than its factorization.

25621772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881 (or 3879 counting only the distinct ones).

The product of its digits is 11760, while the sum is 32.

The square root of 25621772 is about 5061.7953336736. The cubic root of 25621772 is about 294.8060469810.

It can be divided in two parts, 2562 and 1772, that added together give a palindrome (4334).

The spelling of 25621772 in words is "twenty-five million, six hundred twenty-one thousand, seven hundred seventy-two".