74123 has 4 divisors (see below), whose sum is σ = 84720. Its totient is φ = 63528.

The previous prime is 74101. The next prime is 74131. The reversal of 74123 is 32147.

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 74123 - 2⁸ = 73867 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5288 + ... + 5301.

It is an arithmetic number, because the mean of its divisors is an integer number (21180).

2⁷⁴¹²³ is an apocalyptic number.

74123 is a deficient number, since it is larger than the sum of its proper divisors (10597).

74123 is a wasteful number, since it uses less digits than its factorization.

74123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10596.

The product of its digits is 168, while the sum is 17.

The square root of 74123 is about 272.2553948042. The cubic root of 74123 is about 42.0066127154.

The spelling of 74123 in words is "seventy-four thousand, one hundred twenty-three", and thus it is an iban number.