1143681 has 16 divisors (see below), whose sum is σ = 1901568. Its totient is φ = 594000.

The previous prime is 1143679. The next prime is 1143697. The reversal of 1143681 is 1863411.

It is not a de Polignac number, because 1143681 - 2¹ = 1143679 is a prime.

It is a super-2 number, since 2×1143681² = 2616012459522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1143601) 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, 2245 + ... + 2706.

It is an arithmetic number, because the mean of its divisors is an integer number (118848).

2^1143681 is an apocalyptic number.

1143681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1143681 is a deficient number, since it is larger than the sum of its proper divisors (757887).

1143681 is a wasteful number, since it uses less digits than its factorization.

1143681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4972.

The product of its digits is 576, while the sum is 24.

The square root of 1143681 is about 1069.4302221277. The cubic root of 1143681 is about 104.5767085568.

The spelling of 1143681 in words is "one million, one hundred forty-three thousand, six hundred eighty-one".