125513513 has 8 divisors (see below), whose sum is σ = 131126016. Its totient is φ = 119998800.

The previous prime is 125513503. The next prime is 125513551. The reversal of 125513513 is 315315521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125513513 - 2⁸ = 125513257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125513503) 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 7 ways as a sum of consecutive naturals, for example, 21818 + ... + 26963.

It is an arithmetic number, because the mean of its divisors is an integer number (16390752).

Almost surely, 2^125513513 is an apocalyptic number.

It is an amenable number.

125513513 is a deficient number, since it is larger than the sum of its proper divisors (5612503).

125513513 is an equidigital number, since it uses as much as digits as its factorization.

125513513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48895.

The product of its digits is 2250, while the sum is 26.

The square root of 125513513 is about 11203.2813496761. The cubic root of 125513513 is about 500.6837485496.

The spelling of 125513513 in words is "one hundred twenty-five million, five hundred thirteen thousand, five hundred thirteen".