2642743 has 4 divisors (see below), whose sum is σ = 2663680. Its totient is φ = 2621808.

The previous prime is 2642713. The next prime is 2642771. The reversal of 2642743 is 3472462.

2642743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2642743 - 2⁹ = 2642231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10278 + ... + 10531.

It is an arithmetic number, because the mean of its divisors is an integer number (665920).

2^2642743 is an apocalyptic number.

2642743 is a deficient number, since it is larger than the sum of its proper divisors (20937).

2642743 is a wasteful number, since it uses less digits than its factorization.

2642743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20936.

The product of its digits is 8064, while the sum is 28.

The square root of 2642743 is about 1625.6515616823. The cubic root of 2642743 is about 138.2563149279.

The spelling of 2642743 in words is "two million, six hundred forty-two thousand, seven hundred forty-three".