1143566 has 4 divisors (see below), whose sum is σ = 1715352. Its totient is φ = 571782.

The previous prime is 1143563. The next prime is 1143577. The reversal of 1143566 is 6653411.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 285890 + ... + 285893.

It is an arithmetic number, because the mean of its divisors is an integer number (428838).

2^1143566 is an apocalyptic number.

1143566 is a deficient number, since it is larger than the sum of its proper divisors (571786).

1143566 is an equidigital number, since it uses as much as digits as its factorization.

1143566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571785.

The product of its digits is 2160, while the sum is 26.

The square root of 1143566 is about 1069.3764538272. The cubic root of 1143566 is about 104.5732032890.

Adding to 1143566 its reverse (6653411), we get a palindrome (7796977).

The spelling of 1143566 in words is "one million, one hundred forty-three thousand, five hundred sixty-six".