2180123 has 4 divisors (see below), whose sum is σ = 2378328. Its totient is φ = 1981920.

The previous prime is 2180119. The next prime is 2180141. The reversal of 2180123 is 3210812.

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 2180123 - 2² = 2180119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2180173) 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, 99086 + ... + 99107.

It is an arithmetic number, because the mean of its divisors is an integer number (594582).

2^2180123 is an apocalyptic number.

2180123 is a deficient number, since it is larger than the sum of its proper divisors (198205).

2180123 is a wasteful number, since it uses less digits than its factorization.

2180123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198204.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2180123 is about 1476.5239584917. The cubic root of 2180123 is about 129.6662642831. Note that the first 3 decimals are identical.

Adding to 2180123 its reverse (3210812), we get a palindrome (5390935).

The spelling of 2180123 in words is "two million, one hundred eighty thousand, one hundred twenty-three".