1143387 has 12 divisors (see below), whose sum is σ = 1887600. Its totient is φ = 653328.

The previous prime is 1143371. The next prime is 1143391. The reversal of 1143387 is 7833411.

It is not a de Polignac number, because 1143387 - 2⁴ = 1143371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1143387.

It is not an unprimeable number, because it can be changed into a prime (1143347) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9012 + ... + 9137.

It is an arithmetic number, because the mean of its divisors is an integer number (157300).

2^1143387 is an apocalyptic number.

1143387 is a deficient number, since it is larger than the sum of its proper divisors (744213).

1143387 is a wasteful number, since it uses less digits than its factorization.

1143387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18162 (or 18159 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 1143387 is about 1069.2927569193. The cubic root of 1143387 is about 104.5677467958.

Adding to 1143387 its reverse (7833411), we get a palindrome (8976798).

The spelling of 1143387 in words is "one million, one hundred forty-three thousand, three hundred eighty-seven".