1090505 has 16 divisors (see below), whose sum is σ = 1485120. Its totient is φ = 762048.

The previous prime is 1090493. The next prime is 1090519. The reversal of 1090505 is 5050901.

It is a cyclic number.

It is not a de Polignac number, because 1090505 - 2⁸ = 1090249 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 794 + ... + 1676.

It is an arithmetic number, because the mean of its divisors is an integer number (92820).

2^1090505 is an apocalyptic number.

It is an amenable number.

1090505 is a deficient number, since it is larger than the sum of its proper divisors (394615).

1090505 is a wasteful number, since it uses less digits than its factorization.

1090505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920.

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 1090505 is about 1044.2724740220. The cubic root of 1090505 is about 102.9301376879.

The spelling of 1090505 in words is "one million, ninety thousand, five hundred five".