74277221 has 8 divisors (see below), whose sum is σ = 75934584. Its totient is φ = 72629440.

The previous prime is 74277197. The next prime is 74277227. The reversal of 74277221 is 12277247.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12040900 + 62236321 = 3470^2 + 7889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74277221 - 2¹⁸ = 74015077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74277227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14591 + ... + 19011.

It is an arithmetic number, because the mean of its divisors is an integer number (9491823).

Almost surely, 2^74277221 is an apocalyptic number.

It is an amenable number.

74277221 is a deficient number, since it is larger than the sum of its proper divisors (1657363).

74277221 is a wasteful number, since it uses less digits than its factorization.

74277221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4791.

The product of its digits is 10976, while the sum is 32.

The square root of 74277221 is about 8618.4233476895. The cubic root of 74277221 is about 420.3572564963.

The spelling of 74277221 in words is "seventy-four million, two hundred seventy-seven thousand, two hundred twenty-one".