74445129 has 24 divisors (see below), whose sum is σ = 121232160. Its totient is φ = 45116280.

The previous prime is 74445127. The next prime is 74445139. The reversal of 74445129 is 92154447.

It is a happy number.

It is not a de Polignac number, because 74445129 - 2¹ = 74445127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74445093 and 74445102.

It is not an unprimeable number, because it can be changed into a prime (74445127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8127 + ... + 14660.

It is an arithmetic number, because the mean of its divisors is an integer number (5051340).

Almost surely, 2^74445129 is an apocalyptic number.

It is an amenable number.

74445129 is a deficient number, since it is larger than the sum of its proper divisors (46787031).

74445129 is a wasteful number, since it uses less digits than its factorization.

74445129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22818 (or 22801 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 74445129 is about 8628.1590736379. The cubic root of 74445129 is about 420.6737655038.

The spelling of 74445129 in words is "seventy-four million, four hundred forty-five thousand, one hundred twenty-nine".