25049409 has 16 divisors (see below), whose sum is σ = 41640960. Its totient is φ = 13012560.

The previous prime is 25049393. The next prime is 25049411. The reversal of 25049409 is 90494052.

It is not a de Polignac number, because 25049409 - 2⁴ = 25049393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 25049409.

It is not an unprimeable number, because it can be changed into a prime (25049489) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53989 + ... + 54450.

It is an arithmetic number, because the mean of its divisors is an integer number (2602560).

Almost surely, 2^25049409 is an apocalyptic number.

It is an amenable number.

25049409 is a deficient number, since it is larger than the sum of its proper divisors (16591551).

25049409 is a wasteful number, since it uses less digits than its factorization.

25049409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108460.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 25049409 is about 5004.9384611601. The cubic root of 25049409 is about 292.5942774480.

The spelling of 25049409 in words is "twenty-five million, forty-nine thousand, four hundred nine".