12920615 has 8 divisors (see below), whose sum is σ = 15736560. Its totient is φ = 10181952.

The previous prime is 12920581. The next prime is 12920647. The reversal of 12920615 is 51602921.

12920615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-12920615 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18950 + ... + 19619.

It is an arithmetic number, because the mean of its divisors is an integer number (1967070).

Almost surely, 2^12920615 is an apocalyptic number.

12920615 is a deficient number, since it is larger than the sum of its proper divisors (2815945).

12920615 is an equidigital number, since it uses as much as digits as its factorization.

12920615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38641.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 12920615 is about 3594.5256988927. The cubic root of 12920615 is about 234.6538740318.

The spelling of 12920615 in words is "twelve million, nine hundred twenty thousand, six hundred fifteen".