12920971 has 8 divisors (see below), whose sum is σ = 14792960. Its totient is φ = 11055528.

The previous prime is 12920951. The next prime is 12920977. The reversal of 12920971 is 17902921.

12920971 is digitally balanced in base 3, 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 not a de Polignac number, because 12920971 - 2¹¹ = 12918923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12920977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3820 + ... + 6358.

It is an arithmetic number, because the mean of its divisors is an integer number (1849120).

Almost surely, 2^12920971 is an apocalyptic number.

12920971 is a deficient number, since it is larger than the sum of its proper divisors (1871989).

12920971 is an equidigital number, since it uses as much as digits as its factorization.

12920971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 12920971 is about 3594.5752182977. The cubic root of 12920971 is about 234.6560291411.

The spelling of 12920971 in words is "twelve million, nine hundred twenty thousand, nine hundred seventy-one".