124321513 has 4 divisors (see below), whose sum is σ = 124519168. Its totient is φ = 124123860.

The previous prime is 124321499. The next prime is 124321523. The reversal of 124321513 is 315123421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 124321513 - 2²⁵ = 90767081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124321523) 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, 97881 + ... + 99142.

It is an arithmetic number, because the mean of its divisors is an integer number (31129792).

Almost surely, 2^124321513 is an apocalyptic number.

It is an amenable number.

124321513 is a deficient number, since it is larger than the sum of its proper divisors (197655).

124321513 is an equidigital number, since it uses as much as digits as its factorization.

124321513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197654.

The product of its digits is 720, while the sum is 22.

The square root of 124321513 is about 11149.9557398225. The cubic root of 124321513 is about 499.0937089322.

Adding to 124321513 its reverse (315123421), we get a palindrome (439444934).

The spelling of 124321513 in words is "one hundred twenty-four million, three hundred twenty-one thousand, five hundred thirteen".