12501491 has 2 divisors, whose sum is σ = 12501492. Its totient is φ = 12501490.

The previous prime is 12501479. The next prime is 12501497. The reversal of 12501491 is 19410521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12501491 - 2⁶ = 12501427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12501497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6250745 + 6250746.

It is an arithmetic number, because the mean of its divisors is an integer number (6250746).

Almost surely, 2^12501491 is an apocalyptic number.

12501491 is a deficient number, since it is larger than the sum of its proper divisors (1).

12501491 is an equidigital number, since it uses as much as digits as its factorization.

12501491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 12501491 is about 3535.7447588874. The cubic root of 12501491 is about 232.0886687924.

The spelling of 12501491 in words is "twelve million, five hundred one thousand, four hundred ninety-one".