1143864 has 24 divisors (see below), whose sum is σ = 3098160. Its totient is φ = 381264.

The previous prime is 1143851. The next prime is 1143887. The reversal of 1143864 is 4683411.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7872 + ... + 8015.

It is an arithmetic number, because the mean of its divisors is an integer number (129090).

2^1143864 is an apocalyptic number.

It is an amenable number.

1143864 is an abundant number, since it is smaller than the sum of its proper divisors (1954296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1143864 is a wasteful number, since it uses less digits than its factorization.

1143864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15899 (or 15892 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 1143864 is about 1069.5157782847. The cubic root of 1143864 is about 104.5822860202.

The spelling of 1143864 in words is "one million, one hundred forty-three thousand, eight hundred sixty-four".