1143861 has 4 divisors (see below), whose sum is σ = 1525152. Its totient is φ = 762572.

The previous prime is 1143851. The next prime is 1143887. The reversal of 1143861 is 1683411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1143861 - 2⁵ = 1143829 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143851) 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, 190641 + ... + 190646.

It is an arithmetic number, because the mean of its divisors is an integer number (381288).

2^1143861 is an apocalyptic number.

It is an amenable number.

1143861 is a deficient number, since it is larger than the sum of its proper divisors (381291).

1143861 is an equidigital number, since it uses as much as digits as its factorization.

1143861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381290.

The product of its digits is 576, while the sum is 24.

The square root of 1143861 is about 1069.5143757800. The cubic root of 1143861 is about 104.5821945912.

The spelling of 1143861 in words is "one million, one hundred forty-three thousand, eight hundred sixty-one".