74702561 has 2 divisors, whose sum is σ = 74702562. Its totient is φ = 74702560.

The previous prime is 74702549. The next prime is 74702581. The reversal of 74702561 is 16520747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74304400 + 398161 = 8620^2 + 631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74702561 is a prime.

It is not a weakly prime, because it can be changed into another prime (74702581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37351280 + 37351281.

It is an arithmetic number, because the mean of its divisors is an integer number (37351281).

Almost surely, 2^74702561 is an apocalyptic number.

It is an amenable number.

74702561 is a deficient number, since it is larger than the sum of its proper divisors (1).

74702561 is an equidigital number, since it uses as much as digits as its factorization.

74702561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 74702561 is about 8643.0643292758. The cubic root of 74702561 is about 421.1581056759.

The spelling of 74702561 in words is "seventy-four million, seven hundred two thousand, five hundred sixty-one".