2921123 has 4 divisors (see below), whose sum is σ = 2939208. Its totient is φ = 2903040.

The previous prime is 2921111. The next prime is 2921129. The reversal of 2921123 is 3211292.

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 2921123 - 2¹⁸ = 2658979 is a prime.

It is a super-2 number, since 2×2921123² = 17065919162258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2921095 and 2921104.

It is not an unprimeable number, because it can be changed into a prime (2921129) 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, 8798 + ... + 9123.

It is an arithmetic number, because the mean of its divisors is an integer number (734802).

2^2921123 is an apocalyptic number.

2921123 is a deficient number, since it is larger than the sum of its proper divisors (18085).

2921123 is a wasteful number, since it uses less digits than its factorization.

2921123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18084.

The product of its digits is 216, while the sum is 20.

The square root of 2921123 is about 1709.1293104970. The cubic root of 2921123 is about 142.9497109099.

The spelling of 2921123 in words is "two million, nine hundred twenty-one thousand, one hundred twenty-three".