25522642 has 4 divisors (see below), whose sum is σ = 38283966. Its totient is φ = 12761320.

The previous prime is 25522631. The next prime is 25522649. The reversal of 25522642 is 24622552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24710841 + 811801 = 4971^2 + 901^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25522642.

It is not an unprimeable number, because it can be changed into a prime (25522649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6380659 + ... + 6380662.

Almost surely, 2^25522642 is an apocalyptic number.

25522642 is a deficient number, since it is larger than the sum of its proper divisors (12761324).

25522642 is a wasteful number, since it uses less digits than its factorization.

25522642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12761323.

The product of its digits is 9600, while the sum is 28.

The square root of 25522642 is about 5051.9938638126. The cubic root of 25522642 is about 294.4253565043.

The spelling of 25522642 in words is "twenty-five million, five hundred twenty-two thousand, six hundred forty-two".