74128067 has 4 divisors (see below), whose sum is σ = 79830240. Its totient is φ = 68425896.

The previous prime is 74128051. The next prime is 74128091. The reversal of 74128067 is 76082147.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74128067 - 2⁴ = 74128051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74128027) 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 in 3 ways as a sum of consecutive naturals, for example, 2851067 + ... + 2851092.

It is an arithmetic number, because the mean of its divisors is an integer number (19957560).

Almost surely, 2^74128067 is an apocalyptic number.

74128067 is a deficient number, since it is larger than the sum of its proper divisors (5702173).

74128067 is a wasteful number, since it uses less digits than its factorization.

74128067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5702172.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 74128067 is about 8609.7657924011. The cubic root of 74128067 is about 420.0756987517.

The spelling of 74128067 in words is "seventy-four million, one hundred twenty-eight thousand, sixty-seven".