1143256 has 8 divisors (see below), whose sum is σ = 2143620. Its totient is φ = 571624.

The previous prime is 1143239. The next prime is 1143257. The reversal of 1143256 is 6523411.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71446 + ... + 71461.

2^1143256 is an apocalyptic number.

It is an amenable number.

1143256 is a deficient number, since it is larger than the sum of its proper divisors (1000364).

1143256 is a wasteful number, since it uses less digits than its factorization.

1143256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142913 (or 142909 counting only the distinct ones).

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

The square root of 1143256 is about 1069.2314997230. The cubic root of 1143256 is about 104.5637531354.

Adding to 1143256 its reverse (6523411), we get a palindrome (7666667).

The spelling of 1143256 in words is "one million, one hundred forty-three thousand, two hundred fifty-six".