1083861 has 10 divisors (see below), whose sum is σ = 1619222. Its totient is φ = 722520.

The previous prime is 1083851. The next prime is 1083871. The reversal of 1083861 is 1683801.

It is an interprime number because it is at equal distance from previous prime (1083851) and next prime (1083871).

It can be written as a sum of positive squares in only one way, i.e., 731025 + 352836 = 855^2 + 594^2 .

It is not a de Polignac number, because 1083861 - 2⁹ = 1083349 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

1083861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1083851) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6610 + ... + 6771.

2^1083861 is an apocalyptic number.

It is an amenable number.

1083861 is a deficient number, since it is larger than the sum of its proper divisors (535361).

1083861 is an equidigital number, since it uses as much as digits as its factorization.

1083861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13393 (or 13384 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1083861 is about 1041.0864517416. The cubic root of 1083861 is about 102.7206746724.

It can be divided in two parts, 108 and 3861, that added together give a square (3969 = 63²).

The spelling of 1083861 in words is "one million, eighty-three thousand, eight hundred sixty-one".