74212621 has 8 divisors (see below), whose sum is σ = 84867264. Its totient is φ = 63571200.

The previous prime is 74212601. The next prime is 74212627. The reversal of 74212621 is 12621247.

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

It is a de Polignac number, because none of the positive numbers 2^k-74212621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74212627) 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, 17346 + ... + 21196.

It is an arithmetic number, because the mean of its divisors is an integer number (10608408).

Almost surely, 2^74212621 is an apocalyptic number.

It is an amenable number.

74212621 is a deficient number, since it is larger than the sum of its proper divisors (10654643).

74212621 is a wasteful number, since it uses less digits than its factorization.

74212621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6611.

The product of its digits is 1344, while the sum is 25.

The square root of 74212621 is about 8614.6747471974. The cubic root of 74212621 is about 420.2353575049.

Adding to 74212621 its reverse (12621247), we get a palindrome (86833868).

The spelling of 74212621 in words is "seventy-four million, two hundred twelve thousand, six hundred twenty-one".