12542449 has 2 divisors, whose sum is σ = 12542450. Its totient is φ = 12542448.

The previous prime is 12542437. The next prime is 12542459. The reversal of 12542449 is 94424521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11343424 + 1199025 = 3368^2 + 1095^2 .

It is a cyclic number.

It is not a de Polignac number, because 12542449 - 2²¹ = 10445297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12542449.

It is not a weakly prime, because it can be changed into another prime (12542459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271224 + 6271225.

It is an arithmetic number, because the mean of its divisors is an integer number (6271225).

Almost surely, 2^12542449 is an apocalyptic number.

It is an amenable number.

12542449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12542449 is an equidigital number, since it uses as much as digits as its factorization.

12542449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 12542449 is about 3541.5320131265. The cubic root of 12542449 is about 232.3418526015.

The spelling of 12542449 in words is "twelve million, five hundred forty-two thousand, four hundred forty-nine".