125515321 has 8 divisors (see below), whose sum is σ = 127584320. Its totient is φ = 123452208.

The previous prime is 125515319. The next prime is 125515367. The reversal of 125515321 is 123515521.

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 125515321 - 2¹ = 125515319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125515021) 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, 65860 + ... + 67738.

It is an arithmetic number, because the mean of its divisors is an integer number (15948040).

Almost surely, 2^125515321 is an apocalyptic number.

It is an amenable number.

125515321 is a deficient number, since it is larger than the sum of its proper divisors (2068999).

125515321 is an equidigital number, since it uses as much as digits as its factorization.

125515321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943.

The product of its digits is 1500, while the sum is 25.

The square root of 125515321 is about 11203.3620400307. The cubic root of 125515321 is about 500.6861526251.

The spelling of 125515321 in words is "one hundred twenty-five million, five hundred fifteen thousand, three hundred twenty-one".