1143289 has 4 divisors (see below), whose sum is σ = 1306624. Its totient is φ = 979956.

The previous prime is 1143283. The next prime is 1143299. The reversal of 1143289 is 9823411.

It is a happy number.

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 1143289 - 2³ = 1143281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143281) 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, 81657 + ... + 81670.

It is an arithmetic number, because the mean of its divisors is an integer number (326656).

2^1143289 is an apocalyptic number.

It is an amenable number.

1143289 is a deficient number, since it is larger than the sum of its proper divisors (163335).

1143289 is an equidigital number, since it uses as much as digits as its factorization.

1143289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163334.

The product of its digits is 1728, while the sum is 28.

The square root of 1143289 is about 1069.2469312558. The cubic root of 1143289 is about 104.5647592008.

It can be divided in two parts, 114 and 3289, that added together give a triangular number (3403 = T₈₂).

The spelling of 1143289 in words is "one million, one hundred forty-three thousand, two hundred eighty-nine".