2154723 has 4 divisors (see below), whose sum is σ = 2872968. Its totient is φ = 1436480.

The previous prime is 2154707. The next prime is 2154727. The reversal of 2154723 is 3274512.

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 2154723 - 2⁴ = 2154707 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 2154693 and 2154702.

It is not an unprimeable number, because it can be changed into a prime (2154727) 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, 359118 + ... + 359123.

It is an arithmetic number, because the mean of its divisors is an integer number (718242).

2^2154723 is an apocalyptic number.

2154723 is a deficient number, since it is larger than the sum of its proper divisors (718245).

2154723 is an equidigital number, since it uses as much as digits as its factorization.

2154723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718244.

The product of its digits is 1680, while the sum is 24.

The square root of 2154723 is about 1467.8974759839. The cubic root of 2154723 is about 129.1607274874.

It can be divided in two parts, 215472 and 3, that multiplied together give a square (646416 = 804²).

The spelling of 2154723 in words is "two million, one hundred fifty-four thousand, seven hundred twenty-three".