25649075 has 24 divisors (see below), whose sum is σ = 32997888. Its totient is φ = 19765280.

The previous prime is 25649033. The next prime is 25649081. The reversal of 25649075 is 57094652.

It is a happy number.

It is not a de Polignac number, because 25649075 - 2¹² = 25644979 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97394 + ... + 97656.

It is an arithmetic number, because the mean of its divisors is an integer number (1374912).

Almost surely, 2^25649075 is an apocalyptic number.

25649075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25649075 is a deficient number, since it is larger than the sum of its proper divisors (7348813).

25649075 is a wasteful number, since it uses less digits than its factorization.

25649075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 25649075 is about 5064.4915835649. The cubic root of 25649075 is about 294.9107266015.

The spelling of 25649075 in words is "twenty-five million, six hundred forty-nine thousand, seventy-five".