1143889 has 4 divisors (see below), whose sum is σ = 1153024. Its totient is φ = 1134756.

The previous prime is 1143887. The next prime is 1143893. The reversal of 1143889 is 9883411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9883411 = 229 ⋅43159.

It is a cyclic number.

It is not a de Polignac number, because 1143889 - 2¹ = 1143887 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4377 + ... + 4630.

It is an arithmetic number, because the mean of its divisors is an integer number (288256).

2^1143889 is an apocalyptic number.

It is an amenable number.

1143889 is a deficient number, since it is larger than the sum of its proper divisors (9135).

1143889 is an equidigital number, since it uses as much as digits as its factorization.

1143889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9134.

The product of its digits is 6912, while the sum is 34.

The square root of 1143889 is about 1069.5274657530. The cubic root of 1143889 is about 104.5830479226.

The spelling of 1143889 in words is "one million, one hundred forty-three thousand, eight hundred eighty-nine".