1563143 has 2 divisors, whose sum is σ = 1563144. Its totient is φ = 1563142.

The previous prime is 1563137. The next prime is 1563157. The reversal of 1563143 is 3413651.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1563143 - 2⁸ = 1562887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1563743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781571 + 781572.

It is an arithmetic number, because the mean of its divisors is an integer number (781572).

2^1563143 is an apocalyptic number.

1563143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563143 is an equidigital number, since it uses as much as digits as its factorization.

1563143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 1563143 is about 1250.2571735447. The cubic root of 1563143 is about 116.0556362127.

Adding to 1563143 its reverse (3413651), we get a palindrome (4976794).

The spelling of 1563143 in words is "one million, five hundred sixty-three thousand, one hundred forty-three".