126013809 has 8 divisors (see below), whose sum is σ = 177901920. Its totient is φ = 79067456.

The previous prime is 126013799. The next prime is 126013817. The reversal of 126013809 is 908310621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126013809 - 2¹⁹ = 125489521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126013819) 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 7 ways as a sum of consecutive naturals, for example, 1235379 + ... + 1235480.

It is an arithmetic number, because the mean of its divisors is an integer number (22237740).

Almost surely, 2^126013809 is an apocalyptic number.

It is an amenable number.

126013809 is a deficient number, since it is larger than the sum of its proper divisors (51888111).

126013809 is a wasteful number, since it uses less digits than its factorization.

126013809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470879.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 126013809 is about 11225.5872452180. The cubic root of 126013809 is about 501.3481072801.

The spelling of 126013809 in words is "one hundred twenty-six million, thirteen thousand, eight hundred nine".