126490709 has 2 divisors, whose sum is σ = 126490710. Its totient is φ = 126490708.

The previous prime is 126490703. The next prime is 126490739. The reversal of 126490709 is 907094621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115455025 + 11035684 = 10745^2 + 3322^2 .

It is a cyclic number.

It is not a de Polignac number, because 126490709 - 2²⁴ = 109713493 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126490703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63245354 + 63245355.

It is an arithmetic number, because the mean of its divisors is an integer number (63245355).

Almost surely, 2^126490709 is an apocalyptic number.

It is an amenable number.

126490709 is a deficient number, since it is larger than the sum of its proper divisors (1).

126490709 is an equidigital number, since it uses as much as digits as its factorization.

126490709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 126490709 is about 11246.8088362877. The cubic root of 126490709 is about 501.9797627329.

The spelling of 126490709 in words is "one hundred twenty-six million, four hundred ninety thousand, seven hundred nine".