1143000 has 96 divisors (see below), whose sum is σ = 3893760. Its totient is φ = 302400.

The previous prime is 1142971. The next prime is 1143013. The reversal of 1143000 is 3411.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8937 + ... + 9063.

It is an arithmetic number, because the mean of its divisors is an integer number (40560).

2^1143000 is an apocalyptic number.

1143000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1946880).

1143000 is an abundant number, since it is smaller than the sum of its proper divisors (2750760).

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

1143000 is a wasteful number, since it uses less digits than its factorization.

1143000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1143000 is about 1069.1117808723. Note that the first 3 decimals coincide. The cubic root of 1143000 is about 104.5559478498. Note that the first 3 decimals are identical.

Adding to 1143000 its reverse (3411), we get a palindrome (1146411).

The spelling of 1143000 in words is "one million, one hundred forty-three thousand".