74149321 has 9 divisors (see below), whose sum is σ = 75795111. Its totient is φ = 72539064.

The previous prime is 74149319. The next prime is 74149351. The reversal of 74149321 is 12394147.

The square root of 74149321 is 8611.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 51681721 + 22467600 = 7189^2 + 4740^2 .

It is not a de Polignac number, because 74149321 - 2¹ = 74149319 is a prime.

It is a super-2 number, since 2×74149321² = 10996243609522082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74149301) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 680215 + ... + 680323.

It is an arithmetic number, because the mean of its divisors is an integer number (8421679).

Almost surely, 2^74149321 is an apocalyptic number.

74149321 is the 8611-st square number.

74149321 is the 4306-th centered octagonal number.

It is an amenable number.

74149321 is a deficient number, since it is larger than the sum of its proper divisors (1645790).

74149321 is an frugal number, since it uses more digits than its factorization.

74149321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 188 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The cubic root of 74149321 is about 420.1158429512.

The spelling of 74149321 in words is "seventy-four million, one hundred forty-nine thousand, three hundred twenty-one".