125165613 has 4 divisors (see below), whose sum is σ = 166887488. Its totient is φ = 83443740.

The previous prime is 125165587. The next prime is 125165617. The reversal of 125165613 is 316561521.

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.

It is not a de Polignac number, because 125165613 - 2¹⁶ = 125100077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125165617) 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, 20860933 + ... + 20860938.

It is an arithmetic number, because the mean of its divisors is an integer number (41721872).

Almost surely, 2^125165613 is an apocalyptic number.

It is an amenable number.

125165613 is a deficient number, since it is larger than the sum of its proper divisors (41721875).

125165613 is an equidigital number, since it uses as much as digits as its factorization.

125165613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41721874.

The product of its digits is 5400, while the sum is 30.

The square root of 125165613 is about 11187.7438744369. The cubic root of 125165613 is about 500.2207198845.

The spelling of 125165613 in words is "one hundred twenty-five million, one hundred sixty-five thousand, six hundred thirteen".