1097216 has 20 divisors (see below), whose sum is σ = 2193312. Its totient is φ = 548352.

The previous prime is 1097209. The next prime is 1097221. The reversal of 1097216 is 6127901.

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 as a sum of consecutive naturals, namely, 560 + ... + 1583.

2^1097216 is an apocalyptic number.

1097216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1097216 is a deficient number, since it is larger than the sum of its proper divisors (1096096).

1097216 is an frugal number, since it uses more digits than its factorization.

1097216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161 (or 2145 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1097216 is about 1047.4807874133. The cubic root of 1097216 is about 103.1408510682.

The spelling of 1097216 in words is "one million, ninety-seven thousand, two hundred sixteen".