25649426 has 16 divisors (see below), whose sum is σ = 42549408. Its totient is φ = 11498400.

The previous prime is 25649423. The next prime is 25649441. The reversal of 25649426 is 62494652.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25649426.

It is not an unprimeable number, because it can be changed into a prime (25649423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6380 + ... + 9591.

It is an arithmetic number, because the mean of its divisors is an integer number (2659338).

Almost surely, 2^25649426 is an apocalyptic number.

25649426 is a deficient number, since it is larger than the sum of its proper divisors (16899982).

25649426 is a wasteful number, since it uses less digits than its factorization.

25649426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16057.

The product of its digits is 103680, while the sum is 38.

The square root of 25649426 is about 5064.5262364806. The cubic root of 25649426 is about 294.9120718507.

The spelling of 25649426 in words is "twenty-five million, six hundred forty-nine thousand, four hundred twenty-six".