73742561 has 2 divisors, whose sum is σ = 73742562. Its totient is φ = 73742560.

The previous prime is 73742527. The next prime is 73742587. The reversal of 73742561 is 16524737.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72165025 + 1577536 = 8495^2 + 1256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73742561 is a prime.

It is not a weakly prime, because it can be changed into another prime (73742161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36871280 + 36871281.

It is an arithmetic number, because the mean of its divisors is an integer number (36871281).

Almost surely, 2^73742561 is an apocalyptic number.

It is an amenable number.

73742561 is a deficient number, since it is larger than the sum of its proper divisors (1).

73742561 is an equidigital number, since it uses as much as digits as its factorization.

73742561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 35.

The square root of 73742561 is about 8587.3488924114. The cubic root of 73742561 is about 419.3462258682.

The spelling of 73742561 in words is "seventy-three million, seven hundred forty-two thousand, five hundred sixty-one".