74494161 has 45 divisors (see below), whose sum is σ = 130401579. Its totient is φ = 42257376.

The previous prime is 74494139. The next prime is 74494163. The reversal of 74494161 is 16149447.

The square root of 74494161 is 8631.

It is a perfect power (a square), and thus also a powerful number.

74494161 is a `hidden beast` number, since 7 + 4 + 494 + 161 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43758225 + 30735936 = 6615^2 + 5544^2 .

It is not a de Polignac number, because 74494161 - 2⁵ = 74494129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74494163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 543685 + ... + 543821.

Almost surely, 2^74494161 is an apocalyptic number.

74494161 is the 8631-st square number.

74494161 is the 4316-th centered octagonal number.

It is an amenable number.

74494161 is a deficient number, since it is larger than the sum of its proper divisors (55907418).

74494161 is an equidigital number, since it uses as much as digits as its factorization.

74494161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300 (or 147 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The cubic root of 74494161 is about 420.7661017411.

Multiplying 74494161 by its sum of digits (36), we get a square (2681789796 = 51786²).

The spelling of 74494161 in words is "seventy-four million, four hundred ninety-four thousand, one hundred sixty-one".