25539530 has 16 divisors (see below), whose sum is σ = 46103040. Its totient is φ = 10186512.

The previous prime is 25539523. The next prime is 25539551. The reversal of 25539530 is 3593552.

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 7 ways as a sum of consecutive naturals, for example, 191 + ... + 7149.

It is an arithmetic number, because the mean of its divisors is an integer number (2881440).

Almost surely, 2^25539530 is an apocalyptic number.

25539530 is a deficient number, since it is larger than the sum of its proper divisors (20563510).

25539530 is a wasteful number, since it uses less digits than its factorization.

25539530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333.

The product of its (nonzero) digits is 20250, while the sum is 32.

The square root of 25539530 is about 5053.6650067055. The cubic root of 25539530 is about 294.4902813284.

The spelling of 25539530 in words is "twenty-five million, five hundred thirty-nine thousand, five hundred thirty".