74805221 has 2 divisors, whose sum is σ = 74805222. Its totient is φ = 74805220.

The previous prime is 74805193. The next prime is 74805229. The reversal of 74805221 is 12250847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 35880100 = 6239^2 + 5990^2 .

It is a cyclic number.

It is not a de Polignac number, because 74805221 - 2¹⁴ = 74788837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74805229) 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 as a sum of consecutive naturals, namely, 37402610 + 37402611.

It is an arithmetic number, because the mean of its divisors is an integer number (37402611).

Almost surely, 2^74805221 is an apocalyptic number.

It is an amenable number.

74805221 is a deficient number, since it is larger than the sum of its proper divisors (1).

74805221 is an equidigital number, since it uses as much as digits as its factorization.

74805221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 74805221 is about 8649.0011562030. The cubic root of 74805221 is about 421.3509428867.

The spelling of 74805221 in words is "seventy-four million, eight hundred five thousand, two hundred twenty-one".