12956217 has 16 divisors (see below), whose sum is σ = 17790528. Its totient is φ = 8383680.

The previous prime is 12956191. The next prime is 12956249. The reversal of 12956217 is 71265921.

12956217 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12956217 - 2⁸ = 12955961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12956257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14763 + ... + 15615.

It is an arithmetic number, because the mean of its divisors is an integer number (1111908).

Almost surely, 2^12956217 is an apocalyptic number.

It is an amenable number.

12956217 is a deficient number, since it is larger than the sum of its proper divisors (4834311).

12956217 is an equidigital number, since it uses as much as digits as its factorization.

12956217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its digits is 7560, while the sum is 33.

The square root of 12956217 is about 3599.4745449857. The cubic root of 12956217 is about 234.8692013937.

The spelling of 12956217 in words is "twelve million, nine hundred fifty-six thousand, two hundred seventeen".