1081812 has 24 divisors (see below), whose sum is σ = 2673216. Its totient is φ = 339328.

The previous prime is 1081793. The next prime is 1081813. The reversal of 1081812 is 2181801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2448 + ... + 2855.

It is an arithmetic number, because the mean of its divisors is an integer number (111384).

2^1081812 is an apocalyptic number.

1081812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1081812 is an abundant number, since it is smaller than the sum of its proper divisors (1591404).

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

1081812 is a wasteful number, since it uses less digits than its factorization.

1081812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5327 (or 5325 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 1081812 is about 1040.1019180830. The cubic root of 1081812 is about 102.6559039335.

The spelling of 1081812 in words is "one million, eighty-one thousand, eight hundred twelve".