1143685 has 4 divisors (see below), whose sum is σ = 1372428. Its totient is φ = 914944.

The previous prime is 1143679. The next prime is 1143697. The reversal of 1143685 is 5863411.

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 161604 + 982081 = 402^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143685 - 2¹⁵ = 1110917 is a prime.

It is a Duffinian number.

It is a congruent 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, 114364 + ... + 114373.

It is an arithmetic number, because the mean of its divisors is an integer number (343107).

2^1143685 is an apocalyptic number.

It is an amenable number.

1143685 is a deficient number, since it is larger than the sum of its proper divisors (228743).

1143685 is an equidigital number, since it uses as much as digits as its factorization.

1143685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228742.

The product of its digits is 2880, while the sum is 28.

The square root of 1143685 is about 1069.4320922808. The cubic root of 1143685 is about 104.5768304749.

Subtracting from 1143685 its product of digits (2880), we obtain a triangular number (1140805 = T₁₅₁₀).

The spelling of 1143685 in words is "one million, one hundred forty-three thousand, six hundred eighty-five".