1143087685 has 4 divisors (see below), whose sum is σ = 1371705228. Its totient is φ = 914470144.

The previous prime is 1143087677. The next prime is 1143087689. The reversal of 1143087685 is 5867803411.

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 405096129 + 737991556 = 20127^2 + 27166^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143087685 - 2³ = 1143087677 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 (1143087689) 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, 114308764 + ... + 114308773.

It is an arithmetic number, because the mean of its divisors is an integer number (342926307).

Almost surely, 2^1143087685 is an apocalyptic number.

It is an amenable number.

1143087685 is a deficient number, since it is larger than the sum of its proper divisors (228617543).

1143087685 is an equidigital number, since it uses as much as digits as its factorization.

1143087685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228617542.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 1143087685 is about 33809.5797814761. The cubic root of 1143087685 is about 1045.5862144377.

The spelling of 1143087685 in words is "one billion, one hundred forty-three million, eighty-seven thousand, six hundred eighty-five".