74426921 has 2 divisors, whose sum is σ = 74426922. Its totient is φ = 74426920.

The previous prime is 74426909. The next prime is 74426951. The reversal of 74426921 is 12962447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46717225 + 27709696 = 6835^2 + 5264^2 .

It is a cyclic number.

It is not a de Polignac number, because 74426921 - 2¹⁴ = 74410537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74426951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37213460 + 37213461.

It is an arithmetic number, because the mean of its divisors is an integer number (37213461).

Almost surely, 2^74426921 is an apocalyptic number.

It is an amenable number.

74426921 is a deficient number, since it is larger than the sum of its proper divisors (1).

74426921 is an equidigital number, since it uses as much as digits as its factorization.

74426921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 74426921 is about 8627.1038593493. The cubic root of 74426921 is about 420.6394661812.

The spelling of 74426921 in words is "seventy-four million, four hundred twenty-six thousand, nine hundred twenty-one".