12126913 has 2 divisors, whose sum is σ = 12126914. Its totient is φ = 12126912.

The previous prime is 12126889. The next prime is 12126923. The reversal of 12126913 is 31962121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9840769 + 2286144 = 3137^2 + 1512^2 .

It is an emirp because it is prime and its reverse (31962121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12126913 is a prime.

It is not a weakly prime, because it can be changed into another prime (12126923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6063456 + 6063457.

It is an arithmetic number, because the mean of its divisors is an integer number (6063457).

Almost surely, 2^12126913 is an apocalyptic number.

It is an amenable number.

12126913 is a deficient number, since it is larger than the sum of its proper divisors (1).

12126913 is an equidigital number, since it uses as much as digits as its factorization.

12126913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 25.

The square root of 12126913 is about 3482.3717492537. The cubic root of 12126913 is about 229.7471259857.

The spelling of 12126913 in words is "twelve million, one hundred twenty-six thousand, nine hundred thirteen".