3811143 has 16 divisors (see below), whose sum is σ = 5857280. Its totient is φ = 2159136.

The previous prime is 3811141. The next prime is 3811147. The reversal of 3811143 is 3411183.

3811143 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3811143 - 2¹ = 3811141 is a prime.

It is a super-4 number, since 4×3811143⁴ (a number of 27 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

3811143 is a modest number, since divided by 1143 gives 381 as remainder.

3811143 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3811141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1953 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (366080).

Almost surely, 2^3811143 is an apocalyptic number.

3811143 is a deficient number, since it is larger than the sum of its proper divisors (2046137).

3811143 is a wasteful number, since it uses less digits than its factorization.

3811143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566.

The product of its digits is 288, while the sum is 21.

The square root of 3811143 is about 1952.2148959579. The cubic root of 3811143 is about 156.2014573473.

The spelling of 3811143 in words is "three million, eight hundred eleven thousand, one hundred forty-three".