1081815 has 16 divisors (see below), whose sum is σ = 1978368. Its totient is φ = 494496.

The previous prime is 1081813. The next prime is 1081823. The reversal of 1081815 is 5181801.

It is not a de Polignac number, because 1081815 - 2¹ = 1081813 is a prime.

1081815 is a lucky number.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5047 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (123648).

2^1081815 is an apocalyptic number.

1081815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1081815 is a deficient number, since it is larger than the sum of its proper divisors (896553).

1081815 is a wasteful number, since it uses less digits than its factorization.

1081815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10318.

The product of its (nonzero) digits is 320, while the sum is 24.

The square root of 1081815 is about 1040.1033602484. The cubic root of 1081815 is about 102.6559988260.

The spelling of 1081815 in words is "one million, eighty-one thousand, eight hundred fifteen".