25390516 has 12 divisors (see below), whose sum is σ = 44478532. Its totient is φ = 12682368.

The previous prime is 25390507. The next prime is 25390529. The reversal of 25390516 is 61509352.

It can be written as a sum of positive squares in 2 ways, for example, as 12816400 + 12574116 = 3580^2 + 3546^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2236 + ... + 7468.

Almost surely, 2^25390516 is an apocalyptic number.

It is an amenable number.

25390516 is a deficient number, since it is larger than the sum of its proper divisors (19088016).

25390516 is a wasteful number, since it uses less digits than its factorization.

25390516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450 (or 6448 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 25390516 is about 5038.9002768461. The cubic root of 25390516 is about 293.9164153770.

Adding to 25390516 its reverse (61509352), we get a palindrome (86899868).

The spelling of 25390516 in words is "twenty-five million, three hundred ninety thousand, five hundred sixteen".