74243 has 4 divisors (see below), whose sum is σ = 79968. Its totient is φ = 68520.

The previous prime is 74231. The next prime is 74257. The reversal of 74243 is 34247.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34247 = 23 ⋅1489.

It is a cyclic number.

It is not a de Polignac number, because 74243 - 2¹⁴ = 57859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2843 + ... + 2868.

It is an arithmetic number, because the mean of its divisors is an integer number (19992).

2⁷⁴²⁴³ is an apocalyptic number.

74243 is a deficient number, since it is larger than the sum of its proper divisors (5725).

74243 is a wasteful number, since it uses less digits than its factorization.

74243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5724.

The product of its digits is 672, while the sum is 20.

The square root of 74243 is about 272.4756869888. The cubic root of 74243 is about 42.0292690917.

The spelling of 74243 in words is "seventy-four thousand, two hundred forty-three", and thus it is an iban number.