12620969 has 4 divisors (see below), whose sum is σ = 12649044. Its totient is φ = 12592896.

The previous prime is 12620963. The next prime is 12620977. The reversal of 12620969 is 96902621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4141225 + 8479744 = 2035^2 + 2912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12620969 is a prime.

It is a super-2 number, since 2×12620969² = 318577716997922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12620963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13352 + ... + 14265.

It is an arithmetic number, because the mean of its divisors is an integer number (3162261).

Almost surely, 2^12620969 is an apocalyptic number.

It is an amenable number.

12620969 is a deficient number, since it is larger than the sum of its proper divisors (28075).

12620969 is an equidigital number, since it uses as much as digits as its factorization.

12620969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28074.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 12620969 is about 3552.6003152620. The cubic root of 12620969 is about 232.8256906990.

The spelling of 12620969 in words is "twelve million, six hundred twenty thousand, nine hundred sixty-nine".