74234561 has 2 divisors, whose sum is σ = 74234562. Its totient is φ = 74234560.

The previous prime is 74234557. The next prime is 74234569. The reversal of 74234561 is 16543247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65934400 + 8300161 = 8120^2 + 2881^2 .

It is a cyclic number.

It is not a de Polignac number, because 74234561 - 2² = 74234557 is a prime.

It is not a weakly prime, because it can be changed into another prime (74234569) 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, 37117280 + 37117281.

It is an arithmetic number, because the mean of its divisors is an integer number (37117281).

Almost surely, 2^74234561 is an apocalyptic number.

It is an amenable number.

74234561 is a deficient number, since it is larger than the sum of its proper divisors (1).

74234561 is an equidigital number, since it uses as much as digits as its factorization.

74234561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 74234561 is about 8615.9480615890. The cubic root of 74234561 is about 420.2767658044.

The spelling of 74234561 in words is "seventy-four million, two hundred thirty-four thousand, five hundred sixty-one".