1143780 has 48 divisors (see below), whose sum is σ = 3495744. Its totient is φ = 277120.

The previous prime is 1143763. The next prime is 1143799. The reversal of 1143780 is 873411.

It is a self number, because there is not a number n which added to its sum of digits gives 1143780.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (72828).

2^1143780 is an apocalyptic number.

1143780 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 1143780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1747872).

1143780 is an abundant number, since it is smaller than the sum of its proper divisors (2351964).

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

1143780 is a wasteful number, since it uses less digits than its factorization.

1143780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756 (or 1754 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1143780 is about 1069.4765074559. The cubic root of 1143780 is about 104.5797259469.

The spelling of 1143780 in words is "one million, one hundred forty-three thousand, seven hundred eighty".