1085643 has 20 divisors (see below), whose sum is σ = 1748208. Its totient is φ = 667440.

The previous prime is 1085633. The next prime is 1085657. The reversal of 1085643 is 3465801.

1085643 is a `hidden beast` number, since 10 + 8 + 5 + 643 = 666.

It is not a de Polignac number, because 1085643 - 2⁴ = 1085627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1085633) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 538 + ... + 1568.

2^1085643 is an apocalyptic number.

1085643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1085643 is a deficient number, since it is larger than the sum of its proper divisors (662565).

1085643 is a wasteful number, since it uses less digits than its factorization.

1085643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056 (or 1047 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1085643 is about 1041.9419369619. The cubic root of 1085643 is about 102.7769389646.

It can be divided in two parts, 1085 and 643, that added together give a cube (1728 = 12³).

The spelling of 1085643 in words is "one million, eighty-five thousand, six hundred forty-three".