74850021 has 16 divisors (see below), whose sum is σ = 111358720. Its totient is φ = 49688640.

The previous prime is 74850019. The next prime is 74850029. The reversal of 74850021 is 12005847.

It is not a de Polignac number, because 74850021 - 2¹ = 74850019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74850029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 756 + ... + 12258.

It is an arithmetic number, because the mean of its divisors is an integer number (6959920).

Almost surely, 2^74850021 is an apocalyptic number.

It is an amenable number.

74850021 is a deficient number, since it is larger than the sum of its proper divisors (36508699).

74850021 is a wasteful number, since it uses less digits than its factorization.

74850021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11753 (or 11747 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 74850021 is about 8651.5906629937. The cubic root of 74850021 is about 421.4350402038.

Adding to 74850021 its reverse (12005847), we get a palindrome (86855868).

The spelling of 74850021 in words is "seventy-four million, eight hundred fifty thousand, twenty-one".