12515669 has 2 divisors, whose sum is σ = 12515670. Its totient is φ = 12515668.

The previous prime is 12515663. The next prime is 12515681. The reversal of 12515669 is 96651521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10923025 + 1592644 = 3305^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 12515669 - 2¹⁶ = 12450133 is a prime.

It is a super-2 number, since 2×12515669² = 313283941035122, which contains 22 as substring.

It is a Chen prime.

It is equal to p₈₁₉₆₅₆ and since 12515669 and 819656 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12515663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6257834 + 6257835.

It is an arithmetic number, because the mean of its divisors is an integer number (6257835).

Almost surely, 2^12515669 is an apocalyptic number.

It is an amenable number.

12515669 is a deficient number, since it is larger than the sum of its proper divisors (1).

12515669 is an equidigital number, since it uses as much as digits as its factorization.

12515669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 35.

The square root of 12515669 is about 3537.7491431700. The cubic root of 12515669 is about 232.1763732639.

The spelling of 12515669 in words is "twelve million, five hundred fifteen thousand, six hundred sixty-nine".