1143385 has 4 divisors (see below), whose sum is σ = 1372068. Its totient is φ = 914704.

The previous prime is 1143371. The next prime is 1143391. The reversal of 1143385 is 5833411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 267289 + 876096 = 517^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143385 - 2⁷ = 1143257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114334 + ... + 114343.

It is an arithmetic number, because the mean of its divisors is an integer number (343017).

2^1143385 is an apocalyptic number.

It is an amenable number.

1143385 is a deficient number, since it is larger than the sum of its proper divisors (228683).

1143385 is an equidigital number, since it uses as much as digits as its factorization.

1143385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228682.

The product of its digits is 1440, while the sum is 25.

The square root of 1143385 is about 1069.2918217213. The cubic root of 1143385 is about 104.5676858262.

Adding to 1143385 its reverse (5833411), we get a palindrome (6976796).

The spelling of 1143385 in words is "one million, one hundred forty-three thousand, three hundred eighty-five".