1143785 has 4 divisors (see below), whose sum is σ = 1372548. Its totient is φ = 915024.

The previous prime is 1143763. The next prime is 1143799. The reversal of 1143785 is 5873411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5873411 = 241 ⋅24371.

It can be written as a sum of positive squares in 2 ways, for example, as 444889 + 698896 = 667^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143785 - 2⁸ = 1143529 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, 114374 + ... + 114383.

It is an arithmetic number, because the mean of its divisors is an integer number (343137).

2^1143785 is an apocalyptic number.

It is an amenable number.

1143785 is a deficient number, since it is larger than the sum of its proper divisors (228763).

1143785 is an equidigital number, since it uses as much as digits as its factorization.

1143785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228762.

The product of its digits is 3360, while the sum is 29.

The square root of 1143785 is about 1069.4788450456. The cubic root of 1143785 is about 104.5798783358.

The spelling of 1143785 in words is "one million, one hundred forty-three thousand, seven hundred eighty-five".