74420321 has 16 divisors (see below), whose sum is σ = 80403840. Its totient is φ = 68664960.

The previous prime is 74420309. The next prime is 74420327. The reversal of 74420321 is 12302447.

It is a cyclic number.

It is not a de Polignac number, because 74420321 - 2¹⁰ = 74419297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74420327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264701 + ... + 264981.

It is an arithmetic number, because the mean of its divisors is an integer number (5025240).

Almost surely, 2^74420321 is an apocalyptic number.

It is an amenable number.

74420321 is a deficient number, since it is larger than the sum of its proper divisors (5983519).

74420321 is a wasteful number, since it uses less digits than its factorization.

74420321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 74420321 is about 8626.7213354785. The cubic root of 74420321 is about 420.6270320489.

Adding to 74420321 its reverse (12302447), we get a palindrome (86722768).

The spelling of 74420321 in words is "seventy-four million, four hundred twenty thousand, three hundred twenty-one".