12621493 has 2 divisors, whose sum is σ = 12621494. Its totient is φ = 12621492.

The previous prime is 12621487. The next prime is 12621509. The reversal of 12621493 is 39412621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12552849 + 68644 = 3543^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 12621493 - 2⁹ = 12620981 is a prime.

It is equal to p₈₂₆₁₂₉ and since 12621493 and 826129 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12625493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310746 + 6310747.

It is an arithmetic number, because the mean of its divisors is an integer number (6310747).

Almost surely, 2^12621493 is an apocalyptic number.

It is an amenable number.

12621493 is a deficient number, since it is larger than the sum of its proper divisors (1).

12621493 is an equidigital number, since it uses as much as digits as its factorization.

12621493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 12621493 is about 3552.6740632937. The cubic root of 12621493 is about 232.8289128228.

The spelling of 12621493 in words is "twelve million, six hundred twenty-one thousand, four hundred ninety-three".