1081864 has 16 divisors (see below), whose sum is σ = 2318400. Its totient is φ = 463632.

The previous prime is 1081859. The next prime is 1081891. The reversal of 1081864 is 4681801.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a d-powerful number, because it can be written as 1 + 0 + 8³ + 1 + 8⁵ + 6 + 4¹⁰ .

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, 9604 + ... + 9715.

It is an arithmetic number, because the mean of its divisors is an integer number (144900).

2^1081864 is an apocalyptic number.

1081864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1081864 is an abundant number, since it is smaller than the sum of its proper divisors (1236536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1081864 is a wasteful number, since it uses less digits than its factorization.

1081864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19332 (or 19328 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1081864 is about 1040.1269153329. The cubic root of 1081864 is about 102.6575487114.

The spelling of 1081864 in words is "one million, eighty-one thousand, eight hundred sixty-four".