125507513 has 8 divisors (see below), whose sum is σ = 127491936. Its totient is φ = 123530400.

The previous prime is 125507507. The next prime is 125507539. The reversal of 125507513 is 315705521.

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 125507513 - 2⁶ = 125507449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125501513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40178 + ... + 43188.

It is an arithmetic number, because the mean of its divisors is an integer number (15936492).

Almost surely, 2^125507513 is an apocalyptic number.

It is an amenable number.

125507513 is a deficient number, since it is larger than the sum of its proper divisors (1984423).

125507513 is an equidigital number, since it uses as much as digits as its factorization.

125507513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 125507513 is about 11203.0135677861. The cubic root of 125507513 is about 500.6757702576.

The spelling of 125507513 in words is "one hundred twenty-five million, five hundred seven thousand, five hundred thirteen".