2642723 has 4 divisors (see below), whose sum is σ = 2757648. Its totient is φ = 2527800.

The previous prime is 2642713. The next prime is 2642771. The reversal of 2642723 is 3272462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3272462 = 2 ⋅1636231.

It is a cyclic number.

It is not a de Polignac number, because 2642723 - 2⁴ = 2642707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2642692 and 2642701.

It is not an unprimeable number, because it can be changed into a prime (2642713) 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, 57428 + ... + 57473.

It is an arithmetic number, because the mean of its divisors is an integer number (689412).

2^2642723 is an apocalyptic number.

2642723 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2642723 is a deficient number, since it is larger than the sum of its proper divisors (114925).

2642723 is a wasteful number, since it uses less digits than its factorization.

2642723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114924.

The product of its digits is 4032, while the sum is 26.

The square root of 2642723 is about 1625.6454102909. The cubic root of 2642723 is about 138.2559661573.

The spelling of 2642723 in words is "two million, six hundred forty-two thousand, seven hundred twenty-three".