12615649 has 8 divisors (see below), whose sum is σ = 13405608. Its totient is φ = 11831040.

The previous prime is 12615623. The next prime is 12615653. The reversal of 12615649 is 94651621.

It can be written as a sum of positive squares in 4 ways, for example, as 1440000 + 11175649 = 1200^2 + 3343^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12615649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12615149) 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, 4219 + ... + 6559.

It is an arithmetic number, because the mean of its divisors is an integer number (1675701).

Almost surely, 2^12615649 is an apocalyptic number.

It is an amenable number.

12615649 is a deficient number, since it is larger than the sum of its proper divisors (789959).

12615649 is a wasteful number, since it uses less digits than its factorization.

12615649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675.

The product of its digits is 12960, while the sum is 34.

The square root of 12615649 is about 3551.8514890125. The cubic root of 12615649 is about 232.7929724834.

The spelling of 12615649 in words is "twelve million, six hundred fifteen thousand, six hundred forty-nine".