1143559 has 8 divisors (see below), whose sum is σ = 1213568. Its totient is φ = 1075680.

The previous prime is 1143551. The next prime is 1143563. The reversal of 1143559 is 9553411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143559 - 2³ = 1143551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649 + ... + 1645.

It is an arithmetic number, because the mean of its divisors is an integer number (151696).

2^1143559 is an apocalyptic number.

1143559 is a deficient number, since it is larger than the sum of its proper divisors (70009).

1143559 is an equidigital number, since it uses as much as digits as its factorization.

1143559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065.

The product of its digits is 2700, while the sum is 28.

The square root of 1143559 is about 1069.3731808868. The cubic root of 1143559 is about 104.5729899172.

The spelling of 1143559 in words is "one million, one hundred forty-three thousand, five hundred fifty-nine".