1081730 has 32 divisors (see below), whose sum is σ = 2150064. Its totient is φ = 389376.

The previous prime is 1081723. The next prime is 1081733. The reversal of 1081730 is 371801.

It can be written as a sum of positive squares in 8 ways, for example, as 273529 + 808201 = 523^2 + 899^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6812 + ... + 6968.

2^1081730 is an apocalyptic number.

1081730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1081730 is a deficient number, since it is larger than the sum of its proper divisors (1068334).

1081730 is a wasteful number, since it uses less digits than its factorization.

1081730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1081730 is about 1040.0624981221. The cubic root of 1081730 is about 102.6533101382.

The spelling of 1081730 in words is "one million, eighty-one thousand, seven hundred thirty".