25621442 has 32 divisors (see below), whose sum is σ = 49576320. Its totient is φ = 9636480.

The previous prime is 25621441. The next prime is 25621447. The reversal of 25621442 is 24412652.

It is not an unprimeable number, because it can be changed into a prime (25621441) 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 15 ways as a sum of consecutive naturals, for example, 1598 + ... + 7334.

It is an arithmetic number, because the mean of its divisors is an integer number (1549260).

Almost surely, 2^25621442 is an apocalyptic number.

25621442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25621442 is a deficient number, since it is larger than the sum of its proper divisors (23954878).

25621442 is a wasteful number, since it uses less digits than its factorization.

25621442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5786.

The product of its digits is 3840, while the sum is 26.

The square root of 25621442 is about 5061.7627364388. The cubic root of 25621442 is about 294.8047813073.

It can be divided in two parts, 2562 and 1442, that added together give a palindrome (4004).

The spelling of 25621442 in words is "twenty-five million, six hundred twenty-one thousand, four hundred forty-two".