12515449 has 2 divisors, whose sum is σ = 12515450. Its totient is φ = 12515448.

The previous prime is 12515423. The next prime is 12515453. The reversal of 12515449 is 94451521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9809424 + 2706025 = 3132^2 + 1645^2 .

It is a cyclic number.

It is not a de Polignac number, because 12515449 - 2¹¹ = 12513401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12515449.

It is not a weakly prime, because it can be changed into another prime (12515479) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6257724 + 6257725.

It is an arithmetic number, because the mean of its divisors is an integer number (6257725).

Almost surely, 2^12515449 is an apocalyptic number.

It is an amenable number.

12515449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12515449 is an equidigital number, since it uses as much as digits as its factorization.

12515449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

The square root of 12515449 is about 3537.7180498169. The cubic root of 12515449 is about 232.1750128599.

The spelling of 12515449 in words is "twelve million, five hundred fifteen thousand, four hundred forty-nine".