1143564 has 24 divisors (see below), whose sum is σ = 2686320. Its totient is φ = 378624.

The previous prime is 1143563. The next prime is 1143577. The reversal of 1143564 is 4653411.

It is not an unprimeable number, because it can be changed into a prime (1143563) 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, 2592 + ... + 3000.

It is an arithmetic number, because the mean of its divisors is an integer number (111930).

2^1143564 is an apocalyptic number.

It is an amenable number.

1143564 is an abundant number, since it is smaller than the sum of its proper divisors (1542756).

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

1143564 is a wasteful number, since it uses less digits than its factorization.

1143564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 647 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 1143564 is about 1069.3755187024. The cubic root of 1143564 is about 104.5731423257.

Adding to 1143564 its reverse (4653411), we get a palindrome (5796975).

The spelling of 1143564 in words is "one million, one hundred forty-three thousand, five hundred sixty-four".