6861143 has 4 divisors (see below), whose sum is σ = 6883800. Its totient is φ = 6838488.

The previous prime is 6861133. The next prime is 6861157. The reversal of 6861143 is 3411686.

6861143 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 3411686 = 2 ⋅1705843.

It is a cyclic number.

It is not a de Polignac number, because 6861143 - 2⁶ = 6861079 is a prime.

It is an Ulam 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 (6861103) 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, 10868 + ... + 11481.

It is an arithmetic number, because the mean of its divisors is an integer number (1720950).

Almost surely, 2^6861143 is an apocalyptic number.

6861143 is a deficient number, since it is larger than the sum of its proper divisors (22657).

6861143 is a wasteful number, since it uses less digits than its factorization.

6861143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22656.

The product of its digits is 3456, while the sum is 29.

The square root of 6861143 is about 2619.3783613674. The cubic root of 6861143 is about 190.0197855665.

The spelling of 6861143 in words is "six million, eight hundred sixty-one thousand, one hundred forty-three".