25642522 has 4 divisors (see below), whose sum is σ = 38463786. Its totient is φ = 12821260.

The previous prime is 25642501. The next prime is 25642523. The reversal of 25642522 is 22524652.

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., 25391521 + 251001 = 5039^2 + 501^2 .

It is not an unprimeable number, because it can be changed into a prime (25642523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410629 + ... + 6410632.

Almost surely, 2^25642522 is an apocalyptic number.

25642522 is a deficient number, since it is larger than the sum of its proper divisors (12821264).

25642522 is a wasteful number, since it uses less digits than its factorization.

25642522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12821263.

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

The square root of 25642522 is about 5063.8445868727. The cubic root of 25642522 is about 294.8856091968.

It can be divided in two parts, 256 and 42522, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 25642522 in words is "twenty-five million, six hundred forty-two thousand, five hundred twenty-two".