125044513 has 4 divisors (see below), whose sum is σ = 136412208. Its totient is φ = 113676820.

The previous prime is 125044511. The next prime is 125044519. The reversal of 125044513 is 315440521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315440521 = 11 ⋅28676411.

It is a cyclic number.

It is not a de Polignac number, because 125044513 - 2¹ = 125044511 is a prime.

It is a super-2 number, since 2×125044513² = 31272260462814338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125044511) 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, 5683831 + ... + 5683852.

It is an arithmetic number, because the mean of its divisors is an integer number (34103052).

Almost surely, 2^125044513 is an apocalyptic number.

It is an amenable number.

125044513 is a deficient number, since it is larger than the sum of its proper divisors (11367695).

125044513 is a wasteful number, since it uses less digits than its factorization.

125044513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11367694.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 125044513 is about 11182.3303921857. The cubic root of 125044513 is about 500.0593436231.

The spelling of 125044513 in words is "one hundred twenty-five million, forty-four thousand, five hundred thirteen".