126039809 has 16 divisors (see below), whose sum is σ = 147504000. Its totient is φ = 107653392.

The previous prime is 126039791. The next prime is 126039817. The reversal of 126039809 is 908930621.

It is not a de Polignac number, because 126039809 - 2⁸ = 126039553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126039889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143279 + ... + 144155.

It is an arithmetic number, because the mean of its divisors is an integer number (9219000).

Almost surely, 2^126039809 is an apocalyptic number.

It is an amenable number.

126039809 is a deficient number, since it is larger than the sum of its proper divisors (21464191).

126039809 is an frugal number, since it uses more digits than its factorization.

126039809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1303 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 126039809 is about 11226.7452540797. The cubic root of 126039809 is about 501.3825853914.

The spelling of 126039809 in words is "one hundred twenty-six million, thirty-nine thousand, eight hundred nine".