74321 has 4 divisors (see below), whose sum is σ = 80052. Its totient is φ = 68592.

The previous prime is 74317. The next prime is 74323. The reversal of 74321 is 12347.

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 25921 + 48400 = 161^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 74321 - 2² = 74317 is a prime.

It is a super-2 number, since 2×74321² = 11047222082, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 74321.

It is not an unprimeable number, because it can be changed into a prime (74323) 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, 2846 + ... + 2871.

It is an arithmetic number, because the mean of its divisors is an integer number (20013).

2⁷⁴³²¹ is an apocalyptic number.

It is an amenable number.

74321 is a deficient number, since it is larger than the sum of its proper divisors (5731).

74321 is a wasteful number, since it uses less digits than its factorization.

74321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730.

The product of its digits is 168, while the sum is 17.

The square root of 74321 is about 272.6187814513. The cubic root of 74321 is about 42.0439826476.

Adding to 74321 its reverse (12347), we get a palindrome (86668).

The spelling of 74321 in words is "seventy-four thousand, three hundred twenty-one", and thus it is an iban number.