12920215 has 32 divisors (see below), whose sum is σ = 19874304. Its totient is φ = 7827840.

The previous prime is 12920203. The next prime is 12920239. The reversal of 12920215 is 51202921.

12920215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12920215 - 2⁵ = 12920183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13792 + ... + 14698.

It is an arithmetic number, because the mean of its divisors is an integer number (621072).

Almost surely, 2^12920215 is an apocalyptic number.

12920215 is a deficient number, since it is larger than the sum of its proper divisors (6954089).

12920215 is a wasteful number, since it uses less digits than its factorization.

12920215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12920215 is about 3594.4700582979. The cubic root of 12920215 is about 234.6514525135.

The spelling of 12920215 in words is "twelve million, nine hundred twenty thousand, two hundred fifteen".