123043 has 4 divisors (see below), whose sum is σ = 124848. Its totient is φ = 121240.

The previous prime is 123031. The next prime is 123049. The reversal of 123043 is 340321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123043 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (123049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796 + ... + 937.

It is an arithmetic number, because the mean of its divisors is an integer number (31212).

2¹²³⁰⁴³ is an apocalyptic number.

123043 is a deficient number, since it is larger than the sum of its proper divisors (1805).

123043 is an equidigital number, since it uses as much as digits as its factorization.

123043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 123043 is about 350.7748565676. The cubic root of 123043 is about 49.7376929735.

Adding to 123043 its reverse (340321), we get a palindrome (463364).

The spelling of 123043 in words is "one hundred twenty-three thousand, forty-three", and thus it is an iban number.