1090406 has 4 divisors (see below), whose sum is σ = 1635612. Its totient is φ = 545202.

The previous prime is 1090403. The next prime is 1090409. The reversal of 1090406 is 6040901.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1090403) and next prime (1090409).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272600 + ... + 272603.

It is an arithmetic number, because the mean of its divisors is an integer number (408903).

2^1090406 is an apocalyptic number.

1090406 is a deficient number, since it is larger than the sum of its proper divisors (545206).

1090406 is an equidigital number, since it uses as much as digits as its factorization.

1090406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545205.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1090406 is about 1044.2250715243. The cubic root of 1090406 is about 102.9270228032.

The spelling of 1090406 in words is "one million, ninety thousand, four hundred six".