125315321 has 4 divisors (see below), whose sum is σ = 125350644. Its totient is φ = 125280000.

The previous prime is 125315303. The next prime is 125315329. The reversal of 125315321 is 123513521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30525625 + 94789696 = 5525^2 + 9736^2 .

It is a cyclic number.

It is not a de Polignac number, because 125315321 - 2⁶ = 125315257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125315329) 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, 11660 + ... + 19661.

It is an arithmetic number, because the mean of its divisors is an integer number (31337661).

Almost surely, 2^125315321 is an apocalyptic number.

It is an amenable number.

125315321 is a deficient number, since it is larger than the sum of its proper divisors (35323).

125315321 is an equidigital number, since it uses as much as digits as its factorization.

125315321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35322.

The product of its digits is 900, while the sum is 23.

The square root of 125315321 is about 11194.4325894616. The cubic root of 125315321 is about 500.4200749752.

Adding to 125315321 its reverse (123513521), we get a palindrome (248828842).

The spelling of 125315321 in words is "one hundred twenty-five million, three hundred fifteen thousand, three hundred twenty-one".