6742543 has 4 divisors (see below), whose sum is σ = 6747840. Its totient is φ = 6737248.

The previous prime is 6742517. The next prime is 6742553. The reversal of 6742543 is 3452476.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6742543 is a prime.

It is a super-2 number, since 2×6742543² = 90923772213698, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 6⁸ + 7⁴ + 4⁶ + 2¹³ + 5⁵ + 4⁹ + 3¹⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6742553) 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, 546 + ... + 3712.

It is an arithmetic number, because the mean of its divisors is an integer number (1686960).

Almost surely, 2^6742543 is an apocalyptic number.

6742543 is a deficient number, since it is larger than the sum of its proper divisors (5297).

6742543 is a wasteful number, since it uses less digits than its factorization.

6742543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5296.

The product of its digits is 20160, while the sum is 31.

The square root of 6742543 is about 2596.6407144617. The cubic root of 6742543 is about 188.9185375349.

The spelling of 6742543 in words is "six million, seven hundred forty-two thousand, five hundred forty-three".