1090090 has 16 divisors (see below), whose sum is σ = 1992672. Its totient is φ = 429264.

The previous prime is 1090031. The next prime is 1090097. The reversal of 1090090 is 900901.

It is not an unprimeable number, because it can be changed into a prime (1090097) 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, 144 + ... + 1483.

It is an arithmetic number, because the mean of its divisors is an integer number (124542).

2^1090090 is an apocalyptic number.

1090090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1090090 is a deficient number, since it is larger than the sum of its proper divisors (902582).

1090090 is a wasteful number, since it uses less digits than its factorization.

1090090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 1090090 is about 1044.0737521842. The cubic root of 1090090 is about 102.9170790814.

Adding to 1090090 its reverse (900901), we get a palindrome (1990991).

It can be divided in two parts, 10 and 90090, that added together give a triangular number (90100 = T₄₂₄).

The spelling of 1090090 in words is "one million, ninety thousand, ninety".