74415321 has 8 divisors (see below), whose sum is σ = 110244960. Its totient is φ = 49610196.

The previous prime is 74415317. The next prime is 74415347. The reversal of 74415321 is 12351447.

It is not a de Polignac number, because 74415321 - 2² = 74415317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2756123 = 74415321 / (7 + 4 + 4 + 1 + 5 + 3 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (74415301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1378035 + ... + 1378088.

It is an arithmetic number, because the mean of its divisors is an integer number (13780620).

Almost surely, 2^74415321 is an apocalyptic number.

It is an amenable number.

74415321 is a deficient number, since it is larger than the sum of its proper divisors (35829639).

74415321 is a wasteful number, since it uses less digits than its factorization.

74415321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756132 (or 2756126 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 74415321 is about 8626.4315333746. The cubic root of 74415321 is about 420.6176117623.

Adding to 74415321 its reverse (12351447), we get a palindrome (86766768).

The spelling of 74415321 in words is "seventy-four million, four hundred fifteen thousand, three hundred twenty-one".