12504649 has 2 divisors, whose sum is σ = 12504650. Its totient is φ = 12504648.

The previous prime is 12504647. The next prime is 12504659. The reversal of 12504649 is 94640521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7182400 + 5322249 = 2680^2 + 2307^2 .

It is an emirp because it is prime and its reverse (94640521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12504649 - 2¹ = 12504647 is a prime.

It is a super-2 number, since 2×12504649² = 312732493226402, which contains 22 as substring.

Together with 12504647, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12504649.

It is not a weakly prime, because it can be changed into another prime (12504647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6252324 + 6252325.

It is an arithmetic number, because the mean of its divisors is an integer number (6252325).

Almost surely, 2^12504649 is an apocalyptic number.

It is an amenable number.

12504649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12504649 is an equidigital number, since it uses as much as digits as its factorization.

12504649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 12504649 is about 3536.1913126979. The cubic root of 12504649 is about 232.1082097764.

The spelling of 12504649 in words is "twelve million, five hundred four thousand, six hundred forty-nine".