125211513 has 24 divisors (see below), whose sum is σ = 194890752. Its totient is φ = 71297184.

The previous prime is 125211497. The next prime is 125211529. The reversal of 125211513 is 315112521.

It is an interprime number because it is at equal distance from previous prime (125211497) and next prime (125211529).

It is not a de Polignac number, because 125211513 - 2⁴ = 125211497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 125211513.

It is not an unprimeable number, because it can be changed into a prime (125211533) 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 23 ways as a sum of consecutive naturals, for example, 45256 + ... + 47942.

It is an arithmetic number, because the mean of its divisors is an integer number (8120448).

Almost surely, 2^125211513 is an apocalyptic number.

It is an amenable number.

125211513 is a deficient number, since it is larger than the sum of its proper divisors (69679239).

125211513 is a wasteful number, since it uses less digits than its factorization.

125211513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021 (or 3014 counting only the distinct ones).

The product of its digits is 300, while the sum is 21.

The square root of 125211513 is about 11189.7950383374. The cubic root of 125211513 is about 500.2818584151.

The spelling of 125211513 in words is "one hundred twenty-five million, two hundred eleven thousand, five hundred thirteen".