25404669 has 6 divisors (see below), whose sum is σ = 36695646. Its totient is φ = 16936440.

The previous prime is 25404661. The next prime is 25404671. The reversal of 25404669 is 96640452.

It can be written as a sum of positive squares in only one way, i.e., 24621444 + 783225 = 4962^2 + 885^2 .

It is not a de Polignac number, because 25404669 - 2³ = 25404661 is a prime.

It is a super-2 number, since 2×25404669² = 1290794413999122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25404661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1411362 + ... + 1411379.

It is an arithmetic number, because the mean of its divisors is an integer number (6115941).

Almost surely, 2^25404669 is an apocalyptic number.

It is an amenable number.

25404669 is a deficient number, since it is larger than the sum of its proper divisors (11290977).

25404669 is a wasteful number, since it uses less digits than its factorization.

25404669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822747 (or 2822744 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 25404669 is about 5040.3044550900. The cubic root of 25404669 is about 293.9710161626.

The spelling of 25404669 in words is "twenty-five million, four hundred four thousand, six hundred sixty-nine".