800125509 has 32 divisors (see below), whose sum is σ = 1115136000. Its totient is φ = 509955264.

The previous prime is 800125507. The next prime is 800125559. The reversal of 800125509 is 905521008.

It is not a de Polignac number, because 800125509 - 2¹ = 800125507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800125507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1213822 + ... + 1214480.

It is an arithmetic number, because the mean of its divisors is an integer number (34848000).

Almost surely, 2^800125509 is an apocalyptic number.

It is an amenable number.

800125509 is a deficient number, since it is larger than the sum of its proper divisors (315010491).

800125509 is a wasteful number, since it uses less digits than its factorization.

800125509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 800125509 is about 28286.4898670726. The cubic root of 800125509 is about 928.3663109484.

The spelling of 800125509 in words is "eight hundred million, one hundred twenty-five thousand, five hundred nine".