1097805 has 16 divisors (see below), whose sum is σ = 1771200. Its totient is φ = 580608.

The previous prime is 1097797. The next prime is 1097819. The reversal of 1097805 is 5087901.

It is not a de Polignac number, because 1097805 - 2³ = 1097797 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2221 + ... + 2669.

It is an arithmetic number, because the mean of its divisors is an integer number (110700).

2^1097805 is an apocalyptic number.

1097805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1097805 is a deficient number, since it is larger than the sum of its proper divisors (673395).

1097805 is a wasteful number, since it uses less digits than its factorization.

1097805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1097805 is about 1047.7619004335. The cubic root of 1097805 is about 103.1593035558.

The spelling of 1097805 in words is "one million, ninety-seven thousand, eight hundred five".