2129243 has 4 divisors (see below), whose sum is σ = 2132208. Its totient is φ = 2126280.

The previous prime is 2129227. The next prime is 2129261. The reversal of 2129243 is 3429212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2129243 - 2⁴ = 2129227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129203) 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, 353 + ... + 2093.

It is an arithmetic number, because the mean of its divisors is an integer number (533052).

2^2129243 is an apocalyptic number.

2129243 is a deficient number, since it is larger than the sum of its proper divisors (2965).

2129243 is a wasteful number, since it uses less digits than its factorization.

2129243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964.

The product of its digits is 864, while the sum is 23.

The square root of 2129243 is about 1459.1925849592. The cubic root of 2129243 is about 128.6495908624.

The spelling of 2129243 in words is "two million, one hundred twenty-nine thousand, two hundred forty-three".