2005743 has 4 divisors (see below), whose sum is σ = 2674328. Its totient is φ = 1337160.

The previous prime is 2005739. The next prime is 2005747. The reversal of 2005743 is 3475002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2005739) and next prime (2005747).

It is not a de Polignac number, because 2005743 - 2² = 2005739 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005747) 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, 334288 + ... + 334293.

It is an arithmetic number, because the mean of its divisors is an integer number (668582).

2^2005743 is an apocalyptic number.

2005743 is a deficient number, since it is larger than the sum of its proper divisors (668585).

2005743 is an equidigital number, since it uses as much as digits as its factorization.

2005743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668584.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 2005743 is about 1416.2425639699. The cubic root of 2005743 is about 126.1125851865.

It can be divided in two parts, 20057 and 43, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 2005743 in words is "two million, five thousand, seven hundred forty-three".