2042723 has 4 divisors (see below), whose sum is σ = 2063880. Its totient is φ = 2021568.

The previous prime is 2042717. The next prime is 2042749. The reversal of 2042723 is 3272402.

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 2042723 - 2¹⁶ = 1977187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2042695 and 2042704.

It is not an unprimeable number, because it can be changed into a prime (2042753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10433 + ... + 10626.

It is an arithmetic number, because the mean of its divisors is an integer number (515970).

2^2042723 is an apocalyptic number.

2042723 is a deficient number, since it is larger than the sum of its proper divisors (21157).

2042723 is an equidigital number, since it uses as much as digits as its factorization.

2042723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21156.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 2042723 is about 1429.2386084905. The cubic root of 2042723 is about 126.8829185283.

The spelling of 2042723 in words is "two million, forty-two thousand, seven hundred twenty-three".