126290709 has 12 divisors (see below), whose sum is σ = 184126176. Its totient is φ = 83406312.

The previous prime is 126290693. The next prime is 126290711. The reversal of 126290709 is 907092621.

It is not a de Polignac number, because 126290709 - 2⁴ = 126290693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126290789) 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 in 11 ways as a sum of consecutive naturals, for example, 64609 + ... + 66534.

It is an arithmetic number, because the mean of its divisors is an integer number (15343848).

Almost surely, 2^126290709 is an apocalyptic number.

It is an amenable number.

126290709 is a deficient number, since it is larger than the sum of its proper divisors (57835467).

126290709 is a wasteful number, since it uses less digits than its factorization.

126290709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131256 (or 131253 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 126290709 is about 11237.9139078389. The cubic root of 126290709 is about 501.7150557745.

The spelling of 126290709 in words is "one hundred twenty-six million, two hundred ninety thousand, seven hundred nine".