13124321 has 4 divisors (see below), whose sum is σ = 14999232. Its totient is φ = 11249412.

The previous prime is 13124311. The next prime is 13124339. The reversal of 13124321 is 12342131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12342131 = 607 ⋅20333.

It is a cyclic number.

It is not a de Polignac number, because 13124321 - 2¹⁴ = 13107937 is a prime.

It is a super-2 number, since 2×13124321² = 344495603422082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13124321.

It is not an unprimeable number, because it can be changed into a prime (13124311) 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, 937445 + ... + 937458.

It is an arithmetic number, because the mean of its divisors is an integer number (3749808).

Almost surely, 2^13124321 is an apocalyptic number.

It is an amenable number.

13124321 is a deficient number, since it is larger than the sum of its proper divisors (1874911).

13124321 is an equidigital number, since it uses as much as digits as its factorization.

13124321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874910.

The product of its digits is 144, while the sum is 17.

The square root of 13124321 is about 3622.7504744324. The cubic root of 13124321 is about 235.8806312451.

Adding to 13124321 its reverse (12342131), we get a palindrome (25466452).

The spelling of 13124321 in words is "thirteen million, one hundred twenty-four thousand, three hundred twenty-one".