126909915 has 16 divisors (see below), whose sum is σ = 221515776. Its totient is φ = 61532000.

The previous prime is 126909907. The next prime is 126909943. The reversal of 126909915 is 519909621.

It is a happy number.

It is not a de Polignac number, because 126909915 - 2³ = 126909907 is a prime.

It is a super-2 number, since 2×126909915² = 32212253050614450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384411 + ... + 384740.

It is an arithmetic number, because the mean of its divisors is an integer number (13844736).

Almost surely, 2^126909915 is an apocalyptic number.

126909915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

126909915 is a deficient number, since it is larger than the sum of its proper divisors (94605861).

126909915 is a wasteful number, since it uses less digits than its factorization.

126909915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769170.

The product of its (nonzero) digits is 43740, while the sum is 42.

The square root of 126909915 is about 11265.4300849990. The cubic root of 126909915 is about 502.5336924514.

The spelling of 126909915 in words is "one hundred twenty-six million, nine hundred nine thousand, nine hundred fifteen".