25039642 has 12 divisors (see below), whose sum is σ = 38142090. Its totient is φ = 12328536.

The previous prime is 25039633. The next prime is 25039667. The reversal of 25039642 is 24693052.

It can be written as a sum of positive squares in only one way, i.e., 20151121 + 4888521 = 4489^2 + 2211^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 7584 + ... + 10372.

Almost surely, 2^25039642 is an apocalyptic number.

25039642 is a deficient number, since it is larger than the sum of its proper divisors (13102448).

25039642 is an equidigital number, since it uses as much as digits as its factorization.

25039642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925 (or 2858 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 25039642 is about 5003.9626297565. The cubic root of 25039642 is about 292.5562440848.

The spelling of 25039642 in words is "twenty-five million, thirty-nine thousand, six hundred forty-two".