2153123 has 4 divisors (see below), whose sum is σ = 2460720. Its totient is φ = 1845528.

The previous prime is 2153113. The next prime is 2153149. The reversal of 2153123 is 3213512.

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 2153123 - 2⁶ = 2153059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153113) 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, 153788 + ... + 153801.

It is an arithmetic number, because the mean of its divisors is an integer number (615180).

2^2153123 is an apocalyptic number.

2153123 is a deficient number, since it is larger than the sum of its proper divisors (307597).

2153123 is an equidigital number, since it uses as much as digits as its factorization.

2153123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307596.

The product of its digits is 180, while the sum is 17.

The square root of 2153123 is about 1467.3523775835. The cubic root of 2153123 is about 129.1287499298.

Adding to 2153123 its reverse (3213512), we get a palindrome (5366635).

The spelling of 2153123 in words is "two million, one hundred fifty-three thousand, one hundred twenty-three".