2170123 has 4 divisors (see below), whose sum is σ = 2284360. Its totient is φ = 2055888.

The previous prime is 2170121. The next prime is 2170127. The reversal of 2170123 is 3210712.

It is a happy number.

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 2170123 - 2¹ = 2170121 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2170097 and 2170106.

It is not an unprimeable number, because it can be changed into a prime (2170121) 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, 57090 + ... + 57127.

It is an arithmetic number, because the mean of its divisors is an integer number (571090).

2^2170123 is an apocalyptic number.

2170123 is a deficient number, since it is larger than the sum of its proper divisors (114237).

2170123 is a wasteful number, since it uses less digits than its factorization.

2170123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114236.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2170123 is about 1473.1337345944. The cubic root of 2170123 is about 129.4677051096.

Adding to 2170123 its reverse (3210712), we get a palindrome (5380835).

The spelling of 2170123 in words is "two million, one hundred seventy thousand, one hundred twenty-three".