74200021 has 8 divisors (see below), whose sum is σ = 86066240. Its totient is φ = 62650368.

The previous prime is 74200013. The next prime is 74200033. The reversal of 74200021 is 12000247.

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 74200021 - 2³ = 74200013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74199968 and 74200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74200421) 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, 78636 + ... + 79573.

It is an arithmetic number, because the mean of its divisors is an integer number (10758280).

Almost surely, 2^74200021 is an apocalyptic number.

It is an amenable number.

74200021 is a deficient number, since it is larger than the sum of its proper divisors (11866219).

74200021 is a wasteful number, since it uses less digits than its factorization.

74200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158283.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 74200021 is about 8613.9434058972. The cubic root of 74200021 is about 420.2115732971.

Adding to 74200021 its reverse (12000247), we get a palindrome (86200268).

The spelling of 74200021 in words is "seventy-four million, two hundred thousand, twenty-one".