12615530 has 16 divisors (see below), whose sum is σ = 24044040. Its totient is φ = 4749312.

The previous prime is 12615517. The next prime is 12615541. The reversal of 12615530 is 3551621.

It can be written as a sum of positive squares in 4 ways, for example, as 12609601 + 5929 = 3551^2 + 77^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12615496 and 12615505.

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, 36935 + ... + 37274.

Almost surely, 2^12615530 is an apocalyptic number.

12615530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12615530 is a deficient number, since it is larger than the sum of its proper divisors (11428510).

12615530 is a wasteful number, since it uses less digits than its factorization.

12615530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74233.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 12615530 is about 3551.8347371464. The cubic root of 12615530 is about 232.7922405234.

The spelling of 12615530 in words is "twelve million, six hundred fifteen thousand, five hundred thirty".