74102221 has 8 divisors (see below), whose sum is σ = 78289920. Its totient is φ = 70023408.

The previous prime is 74102213. The next prime is 74102239. The reversal of 74102221 is 12220147.

It is a happy number.

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 74102221 - 2³ = 74102213 is a prime.

It is a super-2 number, since 2×74102221² = 10982278314265682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74132221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25821 + ... + 28546.

It is an arithmetic number, because the mean of its divisors is an integer number (9786240).

Almost surely, 2^74102221 is an apocalyptic number.

It is an amenable number.

74102221 is a deficient number, since it is larger than the sum of its proper divisors (4187699).

74102221 is a wasteful number, since it uses less digits than its factorization.

74102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54443.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 74102221 is about 8608.2646915624. The cubic root of 74102221 is about 420.0268709187.

Adding to 74102221 its reverse (12220147), we get a palindrome (86322368).

The spelling of 74102221 in words is "seventy-four million, one hundred two thousand, two hundred twenty-one".