12490921 has 2 divisors, whose sum is σ = 12490922. Its totient is φ = 12490920.

The previous prime is 12490879. The next prime is 12490931. The reversal of 12490921 is 12909421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8785296 + 3705625 = 2964^2 + 1925^2 .

It is a cyclic number.

It is not a de Polignac number, because 12490921 - 2⁹ = 12490409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12490921.

It is not a weakly prime, because it can be changed into another prime (12490931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6245460 + 6245461.

It is an arithmetic number, because the mean of its divisors is an integer number (6245461).

Almost surely, 2^12490921 is an apocalyptic number.

12490921 is the 2041-st hex number.

It is an amenable number.

12490921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12490921 is an equidigital number, since it uses as much as digits as its factorization.

12490921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 12490921 is about 3534.2497082125. The cubic root of 12490921 is about 232.0232400916.

The spelling of 12490921 in words is "twelve million, four hundred ninety thousand, nine hundred twenty-one".