200042123 has 4 divisors (see below), whose sum is σ = 200101920. Its totient is φ = 199982328.

The previous prime is 200042113. The next prime is 200042147. The reversal of 200042123 is 321240002.

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 200042123 - 2⁴ = 200042107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200042098 and 200042107.

It is not an unprimeable number, because it can be changed into a prime (200042113) 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, 24563 + ... + 31676.

It is an arithmetic number, because the mean of its divisors is an integer number (50025480).

Almost surely, 2^200042123 is an apocalyptic number.

200042123 is a deficient number, since it is larger than the sum of its proper divisors (59797).

200042123 is an equidigital number, since it uses as much as digits as its factorization.

200042123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59796.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 200042123 is about 14143.6248182706. The cubic root of 200042123 is about 584.8446008936.

Adding to 200042123 its reverse (321240002), we get a palindrome (521282125).

The spelling of 200042123 in words is "two hundred million, forty-two thousand, one hundred twenty-three".