74537221 has 24 divisors (see below), whose sum is σ = 86839200. Its totient is φ = 63369600.

The previous prime is 74537219. The next prime is 74537251. The reversal of 74537221 is 12273547.

It is not a de Polignac number, because 74537221 - 2¹ = 74537219 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74537201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 536170 + ... + 536308.

It is an arithmetic number, because the mean of its divisors is an integer number (3618300).

Almost surely, 2^74537221 is an apocalyptic number.

It is an amenable number.

74537221 is a deficient number, since it is larger than the sum of its proper divisors (12301979).

74537221 is a wasteful number, since it uses less digits than its factorization.

74537221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 220 counting only the distinct ones).

The product of its digits is 11760, while the sum is 31.

The square root of 74537221 is about 8633.4941362116. The cubic root of 74537221 is about 420.8471581991.

The spelling of 74537221 in words is "seventy-four million, five hundred thirty-seven thousand, two hundred twenty-one".