1143263 has 12 divisors (see below), whose sum is σ = 1305528. Its totient is φ = 992160.

The previous prime is 1143257. The next prime is 1143269. The reversal of 1143263 is 3623411.

It is an interprime number because it is at equal distance from previous prime (1143257) and next prime (1143269).

It is not a de Polignac number, because 1143263 - 2¹⁸ = 881119 is a prime.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21545 + ... + 21597.

It is an arithmetic number, because the mean of its divisors is an integer number (108794).

2^1143263 is an apocalyptic number.

1143263 is a deficient number, since it is larger than the sum of its proper divisors (162265).

1143263 is an equidigital number, since it uses as much as digits as its factorization.

1143263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 101 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 1143263 is about 1069.2347730971. The cubic root of 1143263 is about 104.5639665449.

Adding to 1143263 its reverse (3623411), we get a palindrome (4766674).

The spelling of 1143263 in words is "one million, one hundred forty-three thousand, two hundred sixty-three".