1143531 has 16 divisors (see below), whose sum is σ = 1737120. Its totient is φ = 743040.

The previous prime is 1143529. The next prime is 1143551. The reversal of 1143531 is 1353411.

It is not a de Polignac number, because 1143531 - 2¹ = 1143529 is a prime.

It is a super-2 number, since 2×1143531² = 2615326295922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1143551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 591 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (108570).

2^1143531 is an apocalyptic number.

1143531 is a deficient number, since it is larger than the sum of its proper divisors (593589).

1143531 is a wasteful number, since it uses less digits than its factorization.

1143531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 1077 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 1143531 is about 1069.3600890252. The cubic root of 1143531 is about 104.5721364217.

Adding to 1143531 its reverse (1353411), we get a palindrome (2496942).

The spelling of 1143531 in words is "one million, one hundred forty-three thousand, five hundred thirty-one".