1142563 has 4 divisors (see below), whose sum is σ = 1154440. Its totient is φ = 1130688.

The previous prime is 1142549. The next prime is 1142569. The reversal of 1142563 is 3652411.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142569) 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 3 ways as a sum of consecutive naturals, for example, 5793 + ... + 5986.

It is an arithmetic number, because the mean of its divisors is an integer number (288610).

2^1142563 is an apocalyptic number.

1142563 is a deficient number, since it is larger than the sum of its proper divisors (11877).

1142563 is an equidigital number, since it uses as much as digits as its factorization.

1142563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11876.

The product of its digits is 720, while the sum is 22.

The square root of 1142563 is about 1068.9073860723. The cubic root of 1142563 is about 104.5426212900.

Adding to 1142563 its reverse (3652411), we get a palindrome (4794974).

The spelling of 1142563 in words is "one million, one hundred forty-two thousand, five hundred sixty-three".