25239530 has 8 divisors (see below), whose sum is σ = 45431172. Its totient is φ = 10095808.

The previous prime is 25239523. The next prime is 25239547. The reversal of 25239530 is 3593252.

It can be written as a sum of positive squares in 2 ways, for example, as 23145721 + 2093809 = 4811^2 + 1447^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 25239493 and 25239502.

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, 1261967 + ... + 1261986.

Almost surely, 2^25239530 is an apocalyptic number.

25239530 is a deficient number, since it is larger than the sum of its proper divisors (20191642).

25239530 is a wasteful number, since it uses less digits than its factorization.

25239530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523960.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 25239530 is about 5023.8958986030. The cubic root of 25239530 is about 293.3326604094.

The spelling of 25239530 in words is "twenty-five million, two hundred thirty-nine thousand, five hundred thirty".