43402123 has 4 divisors (see below), whose sum is σ = 43744000. Its totient is φ = 43060248.

The previous prime is 43402109. The next prime is 43402133. The reversal of 43402123 is 32120434.

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 43402123 - 2⁵ = 43402091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43402123.

It is not an unprimeable number, because it can be changed into a prime (43402133) 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, 170748 + ... + 171001.

It is an arithmetic number, because the mean of its divisors is an integer number (10936000).

Almost surely, 2^43402123 is an apocalyptic number.

43402123 is a deficient number, since it is larger than the sum of its proper divisors (341877).

43402123 is a wasteful number, since it uses less digits than its factorization.

43402123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341876.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 43402123 is about 6588.0287643574. The cubic root of 43402123 is about 351.4285099651.

Adding to 43402123 its reverse (32120434), we get a palindrome (75522557).

The spelling of 43402123 in words is "forty-three million, four hundred two thousand, one hundred twenty-three".