25390915 has 8 divisors (see below), whose sum is σ = 33239088. Its totient is φ = 18466080.

The previous prime is 25390913. The next prime is 25390943. The reversal of 25390915 is 51909352.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25390915 - 2¹ = 25390913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25390913) 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 7 ways as a sum of consecutive naturals, for example, 230772 + ... + 230881.

It is an arithmetic number, because the mean of its divisors is an integer number (4154886).

Almost surely, 2^25390915 is an apocalyptic number.

25390915 is a deficient number, since it is larger than the sum of its proper divisors (7848173).

25390915 is a wasteful number, since it uses less digits than its factorization.

25390915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461669.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 25390915 is about 5038.9398686629. The cubic root of 25390915 is about 293.9179549550.

The spelling of 25390915 in words is "twenty-five million, three hundred ninety thousand, nine hundred fifteen".