1090999 has 16 divisors (see below), whose sum is σ = 1415680. Its totient is φ = 816480.

The previous prime is 1090997. The next prime is 1091003. The reversal of 1090999 is 9990901.

It is not a de Polignac number, because 1090999 - 2¹ = 1090997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1414 + ... + 2044.

It is an arithmetic number, because the mean of its divisors is an integer number (88480).

2^1090999 is an apocalyptic number.

1090999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1090999 is a deficient number, since it is larger than the sum of its proper divisors (324681).

1090999 is a wasteful number, since it uses less digits than its factorization.

1090999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670.

The product of its (nonzero) digits is 6561, while the sum is 37.

The square root of 1090999 is about 1044.5089755478. The cubic root of 1090999 is about 102.9456778312.

The spelling of 1090999 in words is "one million, ninety thousand, nine hundred ninety-nine".