2154123 has 6 divisors (see below), whose sum is σ = 3111524. Its totient is φ = 1436076.

The previous prime is 2154109. The next prime is 2154127. The reversal of 2154123 is 3214512.

2154123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2154123 - 2⁶ = 2154059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2154096 and 2154105.

It is not an unprimeable number, because it can be changed into a prime (2154127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119665 + ... + 119682.

2^2154123 is an apocalyptic number.

2154123 is a deficient number, since it is larger than the sum of its proper divisors (957401).

2154123 is a wasteful number, since it uses less digits than its factorization.

2154123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239353 (or 239350 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2154123 is about 1467.6930878082. The cubic root of 2154123 is about 129.1487377589.

Adding to 2154123 its reverse (3214512), we get a palindrome (5368635).

The spelling of 2154123 in words is "two million, one hundred fifty-four thousand, one hundred twenty-three".