6724321 has 4 divisors (see below), whose sum is σ = 6824752. Its totient is φ = 6623892.

The previous prime is 6724307. The next prime is 6724351. The reversal of 6724321 is 1234276.

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 6724321 - 2¹¹ = 6722273 is a prime.

It is a super-2 number, since 2×6724321² = 90432985822082, which contains 22 as substring.

It is a Duffinian number.

6724321 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6724301) 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, 50115 + ... + 50248.

It is an arithmetic number, because the mean of its divisors is an integer number (1706188).

Almost surely, 2^6724321 is an apocalyptic number.

It is an amenable number.

6724321 is a deficient number, since it is larger than the sum of its proper divisors (100431).

6724321 is a wasteful number, since it uses less digits than its factorization.

6724321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100430.

The product of its digits is 2016, while the sum is 25.

The square root of 6724321 is about 2593.1295763999. The cubic root of 6724321 is about 188.7481972841.

Adding to 6724321 its reverse (1234276), we get a palindrome (7958597).

The spelling of 6724321 in words is "six million, seven hundred twenty-four thousand, three hundred twenty-one".