12315449 has 2 divisors, whose sum is σ = 12315450. Its totient is φ = 12315448.

The previous prime is 12315427. The next prime is 12315461. The reversal of 12315449 is 94451321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6760000 + 5555449 = 2600^2 + 2357^2 .

It is an emirp because it is prime and its reverse (94451321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12315449 - 2²⁰ = 11266873 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12315469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157724 + 6157725.

It is an arithmetic number, because the mean of its divisors is an integer number (6157725).

Almost surely, 2^12315449 is an apocalyptic number.

It is an amenable number.

12315449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315449 is an equidigital number, since it uses as much as digits as its factorization.

12315449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 12315449 is about 3509.3374018467. The cubic root of 12315449 is about 230.9316277225.

The spelling of 12315449 in words is "twelve million, three hundred fifteen thousand, four hundred forty-nine".