12956669 has 16 divisors (see below), whose sum is σ = 15085440. Its totient is φ = 10997760.

The previous prime is 12956663. The next prime is 12956681. The reversal of 12956669 is 96665921.

It is a cyclic number.

It is not a de Polignac number, because 12956669 - 2¹² = 12952573 is a prime.

It is a super-2 number, since 2×12956669² = 335750543151122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12956663) 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, 35912 + ... + 36270.

It is an arithmetic number, because the mean of its divisors is an integer number (942840).

Almost surely, 2^12956669 is an apocalyptic number.

It is an amenable number.

12956669 is a deficient number, since it is larger than the sum of its proper divisors (2128771).

12956669 is a wasteful number, since it uses less digits than its factorization.

12956669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its digits is 174960, while the sum is 44.

The square root of 12956669 is about 3599.5373313802. The cubic root of 12956669 is about 234.8719326345.

The spelling of 12956669 in words is "twelve million, nine hundred fifty-six thousand, six hundred sixty-nine".