125200509 has 16 divisors (see below), whose sum is σ = 192673920. Its totient is φ = 70833600.

The previous prime is 125200501. The next prime is 125200513. The reversal of 125200509 is 905002521.

It is not a de Polignac number, because 125200509 - 2³ = 125200501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125200501) by changing a digit.

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, 27394 + ... + 31635.

It is an arithmetic number, because the mean of its divisors is an integer number (12042120).

Almost surely, 2^125200509 is an apocalyptic number.

It is an amenable number.

125200509 is a deficient number, since it is larger than the sum of its proper divisors (67473411).

125200509 is a wasteful number, since it uses less digits than its factorization.

125200509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59140.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 125200509 is about 11189.3033295197. The cubic root of 125200509 is about 500.2672025135.

The spelling of 125200509 in words is "one hundred twenty-five million, two hundred thousand, five hundred nine".