12920515 has 8 divisors (see below), whose sum is σ = 16039440. Its totient is φ = 9979872.

The previous prime is 12920507. The next prime is 12920563. The reversal of 12920515 is 51502921.

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

It is a cyclic number.

It is not a de Polignac number, because 12920515 - 2³ = 12920507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12920515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44409 + ... + 44698.

It is an arithmetic number, because the mean of its divisors is an integer number (2004930).

Almost surely, 2^12920515 is an apocalyptic number.

12920515 is a deficient number, since it is larger than the sum of its proper divisors (3118925).

12920515 is an equidigital number, since it uses as much as digits as its factorization.

12920515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89141.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 12920515 is about 3594.5117888247. The cubic root of 12920515 is about 234.6532686569.

The spelling of 12920515 in words is "twelve million, nine hundred twenty thousand, five hundred fifteen".