125509045 has 32 divisors (see below), whose sum is σ = 170387712. Its totient is φ = 88230912.

The previous prime is 125509037. The next prime is 125509051. The reversal of 125509045 is 540905521.

It is a cyclic number.

It is not a de Polignac number, because 125509045 - 2³ = 125509037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125508998 and 125509016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83319 + ... + 84811.

It is an arithmetic number, because the mean of its divisors is an integer number (5324616).

Almost surely, 2^125509045 is an apocalyptic number.

It is an amenable number.

125509045 is a deficient number, since it is larger than the sum of its proper divisors (44878667).

125509045 is a wasteful number, since it uses less digits than its factorization.

125509045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 125509045 is about 11203.0819420372. The cubic root of 125509045 is about 500.6778074057.

The spelling of 125509045 in words is "one hundred twenty-five million, five hundred nine thousand, forty-five".