125245513 has 4 divisors (see below), whose sum is σ = 125288068. Its totient is φ = 125202960.

The previous prime is 125245501. The next prime is 125245607. The reversal of 125245513 is 315542521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71707024 + 53538489 = 8468^2 + 7317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125245513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125245313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16506 + ... + 22867.

It is an arithmetic number, because the mean of its divisors is an integer number (31322017).

Almost surely, 2^125245513 is an apocalyptic number.

It is an amenable number.

125245513 is a deficient number, since it is larger than the sum of its proper divisors (42555).

125245513 is an equidigital number, since it uses as much as digits as its factorization.

125245513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42554.

The product of its digits is 6000, while the sum is 28.

The square root of 125245513 is about 11191.3141766282. The cubic root of 125245513 is about 500.3271365833.

The spelling of 125245513 in words is "one hundred twenty-five million, two hundred forty-five thousand, five hundred thirteen".