25396642 has 4 divisors (see below), whose sum is σ = 38094966. Its totient is φ = 12698320.

The previous prime is 25396639. The next prime is 25396687. The reversal of 25396642 is 24669352.

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., 22080601 + 3316041 = 4699^2 + 1821^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6349159 + ... + 6349162.

Almost surely, 2^25396642 is an apocalyptic number.

25396642 is a deficient number, since it is larger than the sum of its proper divisors (12698324).

25396642 is a wasteful number, since it uses less digits than its factorization.

25396642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12698323.

The product of its digits is 77760, while the sum is 37.

The square root of 25396642 is about 5039.5081109172. The cubic root of 25396642 is about 293.9400513306.

The spelling of 25396642 in words is "twenty-five million, three hundred ninety-six thousand, six hundred forty-two".