74157621 has 8 divisors (see below), whose sum is σ = 104693184. Its totient is φ = 46530240.

The previous prime is 74157619. The next prime is 74157641. The reversal of 74157621 is 12675147.

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

It is not a de Polignac number, because 74157621 - 2¹ = 74157619 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74157641) 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, 726985 + ... + 727086.

It is an arithmetic number, because the mean of its divisors is an integer number (13086648).

Almost surely, 2^74157621 is an apocalyptic number.

It is an amenable number.

74157621 is a deficient number, since it is larger than the sum of its proper divisors (30535563).

74157621 is a wasteful number, since it uses less digits than its factorization.

74157621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454091.

The product of its digits is 11760, while the sum is 33.

The square root of 74157621 is about 8611.4819282165. The cubic root of 74157621 is about 420.1315177695.

The spelling of 74157621 in words is "seventy-four million, one hundred fifty-seven thousand, six hundred twenty-one".