25239669 has 32 divisors (see below), whose sum is σ = 42147840. Its totient is φ = 13079232.

The previous prime is 25239659. The next prime is 25239703. The reversal of 25239669 is 96693252.

It is not a de Polignac number, because 25239669 - 2⁸ = 25239413 is a prime.

It is a super-2 number, since 2×25239669² = 1274081782459122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25239669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25239629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15324 + ... + 16890.

It is an arithmetic number, because the mean of its divisors is an integer number (1317120).

Almost surely, 2^25239669 is an apocalyptic number.

It is an amenable number.

25239669 is a deficient number, since it is larger than the sum of its proper divisors (16908171).

25239669 is a wasteful number, since it uses less digits than its factorization.

25239669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649.

The product of its digits is 174960, while the sum is 42.

The square root of 25239669 is about 5023.9097324693. The cubic root of 25239669 is about 293.3331988923. Note that the first 3 decimals are identical.

The spelling of 25239669 in words is "twenty-five million, two hundred thirty-nine thousand, six hundred sixty-nine".