1143856 has 30 divisors (see below), whose sum is σ = 2579820. Its totient is φ = 489888.

The previous prime is 1143851. The next prime is 1143887. The reversal of 1143856 is 6583411.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

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 5 ways as a sum of consecutive naturals, for example, 55 + ... + 1513.

It is an arithmetic number, because the mean of its divisors is an integer number (85994).

2^1143856 is an apocalyptic number.

1143856 is a gapful number since it is divisible by the number (16) 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 1143856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1289910).

1143856 is an abundant number, since it is smaller than the sum of its proper divisors (1435964).

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

1143856 is a wasteful number, since it uses less digits than its factorization.

1143856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481 (or 1468 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 1143856 is about 1069.5120382679. The cubic root of 1143856 is about 104.5820422091.

Subtracting from 1143856 its sum of digits (28), we obtain a triangular number (1143828 = T₁₅₁₂).

The spelling of 1143856 in words is "one million, one hundred forty-three thousand, eight hundred fifty-six".