74701921 has 6 divisors (see below), whose sum is σ = 86898210. Its totient is φ = 64030176.

The previous prime is 74701903. The next prime is 74701981. The reversal of 74701921 is 12910747.

It can be written as a sum of positive squares in only one way, i.e., 65934400 + 8767521 = 8120^2 + 2961^2 .

It is not a de Polignac number, because 74701921 - 2¹⁷ = 74570849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74701981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 762216 + ... + 762313.

It is an arithmetic number, because the mean of its divisors is an integer number (14483035).

Almost surely, 2^74701921 is an apocalyptic number.

It is an amenable number.

74701921 is a deficient number, since it is larger than the sum of its proper divisors (12196289).

74701921 is a wasteful number, since it uses less digits than its factorization.

74701921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524543 (or 1524536 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 74701921 is about 8643.0273052907. The cubic root of 74701921 is about 421.1569029418.

The spelling of 74701921 in words is "seventy-four million, seven hundred one thousand, nine hundred twenty-one".