74051921 has 2 divisors, whose sum is σ = 74051922. Its totient is φ = 74051920.

The previous prime is 74051909. The next prime is 74051933. The reversal of 74051921 is 12915047.

It is a balanced prime because it is at equal distance from previous prime (74051909) and next prime (74051933).

It can be written as a sum of positive squares in only one way, i.e., 59459521 + 14592400 = 7711^2 + 3820^2 .

It is a cyclic number.

It is not a de Polignac number, because 74051921 - 2¹⁴ = 74035537 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (74051981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37025960 + 37025961.

It is an arithmetic number, because the mean of its divisors is an integer number (37025961).

Almost surely, 2^74051921 is an apocalyptic number.

It is an amenable number.

74051921 is a deficient number, since it is larger than the sum of its proper divisors (1).

74051921 is an equidigital number, since it uses as much as digits as its factorization.

74051921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 74051921 is about 8605.3425846970. The cubic root of 74051921 is about 419.9318124374.

Adding to 74051921 its reverse (12915047), we get a palindrome (86966968).

The spelling of 74051921 in words is "seventy-four million, fifty-one thousand, nine hundred twenty-one".