6781143 has 8 divisors (see below), whose sum is σ = 9251968. Its totient is φ = 4415544.

The previous prime is 6781141. The next prime is 6781153. The reversal of 6781143 is 3411876.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6781143 - 2¹ = 6781141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6781143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26155 + ... + 26412.

It is an arithmetic number, because the mean of its divisors is an integer number (1156496).

Almost surely, 2^6781143 is an apocalyptic number.

6781143 is a deficient number, since it is larger than the sum of its proper divisors (2470825).

6781143 is a wasteful number, since it uses less digits than its factorization.

6781143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52613.

The product of its digits is 4032, while the sum is 30.

The square root of 6781143 is about 2604.0627872615. The cubic root of 6781143 is about 189.2783614157.

The spelling of 6781143 in words is "six million, seven hundred eighty-one thousand, one hundred forty-three".