1143389 has 8 divisors (see below), whose sum is σ = 1239672. Its totient is φ = 1048320.

The previous prime is 1143371. The next prime is 1143391. The reversal of 1143389 is 9833411.

It can be written as a sum of positive squares in 4 ways, for example, as 4900 + 1138489 = 70^2 + 1067^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1143389 - 2¹² = 1139293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143089) 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 7 ways as a sum of consecutive naturals, for example, 3497 + ... + 3809.

It is an arithmetic number, because the mean of its divisors is an integer number (154959).

2^1143389 is an apocalyptic number.

It is an amenable number.

1143389 is a deficient number, since it is larger than the sum of its proper divisors (96283).

1143389 is a wasteful number, since it uses less digits than its factorization.

1143389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607.

The product of its digits is 2592, while the sum is 29.

The square root of 1143389 is about 1069.2936921164. The cubic root of 1143389 is about 104.5678077654.

The spelling of 1143389 in words is "one million, one hundred forty-three thousand, three hundred eighty-nine".