43123 has 4 divisors (see below), whose sum is σ = 44640. Its totient is φ = 41608.

The previous prime is 43117. The next prime is 43133. The reversal of 43123 is 32134.

43123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32134 = 2 ⋅16067.

It is a cyclic number.

It is not a de Polignac number, because 43123 - 2⁹ = 42611 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (43103) 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, 715 + ... + 772.

It is an arithmetic number, because the mean of its divisors is an integer number (11160).

2⁴³¹²³ is an apocalyptic number.

43123 is a deficient number, since it is larger than the sum of its proper divisors (1517).

43123 is a wasteful number, since it uses less digits than its factorization.

43123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516.

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

The square root of 43123 is about 207.6607810830. The cubic root of 43123 is about 35.0673532967.

Adding to 43123 its reverse (32134), we get a palindrome (75257).

It can be divided in two parts, 431 and 23, that added together give a palindrome (454).

The spelling of 43123 in words is "forty-three thousand, one hundred twenty-three", and thus it is an iban number.