124513321 has 4 divisors (see below), whose sum is σ = 131837652. Its totient is φ = 117188992.

The previous prime is 124513309. The next prime is 124513331. The reversal of 124513321 is 123315421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123315421 = 97 ⋅1271293.

It can be written as a sum of positive squares in 2 ways, for example, as 47073321 + 77440000 = 6861^2 + 8800^2 .

It is a cyclic number.

It is not a de Polignac number, because 124513321 - 2⁹ = 124512809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 124513292 and 124513301.

It is not an unprimeable number, because it can be changed into a prime (124513331) 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, 3662140 + ... + 3662173.

It is an arithmetic number, because the mean of its divisors is an integer number (32959413).

Almost surely, 2^124513321 is an apocalyptic number.

It is an amenable number.

124513321 is a deficient number, since it is larger than the sum of its proper divisors (7324331).

124513321 is an equidigital number, since it uses as much as digits as its factorization.

124513321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7324330.

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

The square root of 124513321 is about 11158.5537145277. The cubic root of 124513321 is about 499.3502506841.

Adding to 124513321 its reverse (123315421), we get a palindrome (247828742).

The spelling of 124513321 in words is "one hundred twenty-four million, five hundred thirteen thousand, three hundred twenty-one".