74241581 has 2 divisors, whose sum is σ = 74241582. Its totient is φ = 74241580.

The previous prime is 74241553. The next prime is 74241599. The reversal of 74241581 is 18514247.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69973225 + 4268356 = 8365^2 + 2066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74241581 is a prime.

It is a super-2 number, since 2×74241581² = 11023624698759122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74241281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37120790 + 37120791.

It is an arithmetic number, because the mean of its divisors is an integer number (37120791).

Almost surely, 2^74241581 is an apocalyptic number.

It is an amenable number.

74241581 is a deficient number, since it is larger than the sum of its proper divisors (1).

74241581 is an equidigital number, since it uses as much as digits as its factorization.

74241581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 32.

The square root of 74241581 is about 8616.3554360298. The cubic root of 74241581 is about 420.2900132274.

The spelling of 74241581 in words is "seventy-four million, two hundred forty-one thousand, five hundred eighty-one".