1081899 has 24 divisors (see below), whose sum is σ = 1924832. Its totient is φ = 570240.

The previous prime is 1081891. The next prime is 1081901. The reversal of 1081899 is 9981801.

It is not a de Polignac number, because 1081899 - 2³ = 1081891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1081891) 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 23 ways as a sum of consecutive naturals, for example, 159 + ... + 1479.

2^1081899 is an apocalyptic number.

1081899 is a deficient number, since it is larger than the sum of its proper divisors (842933).

1081899 is a wasteful number, since it uses less digits than its factorization.

1081899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1344 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1081899 is about 1040.1437400667. The cubic root of 1081899 is about 102.6586557438.

The spelling of 1081899 in words is "one million, eighty-one thousand, eight hundred ninety-nine".