1143021 has 16 divisors (see below), whose sum is σ = 1751040. Its totient is φ = 655920.

The previous prime is 1143019. The next prime is 1143047. The reversal of 1143021 is 1203411.

It is a happy number.

It is not a de Polignac number, because 1143021 - 2¹ = 1143019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1142988 and 1143006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143061) 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 15 ways as a sum of consecutive naturals, for example, 285 + ... + 1538.

It is an arithmetic number, because the mean of its divisors is an integer number (109440).

2^1143021 is an apocalyptic number.

1143021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1143021 is a deficient number, since it is larger than the sum of its proper divisors (608019).

1143021 is a wasteful number, since it uses less digits than its factorization.

1143021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1143021 is about 1069.1216020640. The cubic root of 1143021 is about 104.5565881710.

Adding to 1143021 its reverse (1203411), we get a palindrome (2346432).

The spelling of 1143021 in words is "one million, one hundred forty-three thousand, twenty-one".