1091207 has 4 divisors (see below), whose sum is σ = 1175160. Its totient is φ = 1007256.

The previous prime is 1091191. The next prime is 1091219. The reversal of 1091207 is 7021901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7021901 = 17 ⋅413053.

It is a cyclic number.

It is not a de Polignac number, because 1091207 - 2⁴ = 1091191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41957 + ... + 41982.

It is an arithmetic number, because the mean of its divisors is an integer number (293790).

2^1091207 is an apocalyptic number.

1091207 is a deficient number, since it is larger than the sum of its proper divisors (83953).

1091207 is an equidigital number, since it uses as much as digits as its factorization.

1091207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83952.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1091207 is about 1044.6085391188. The cubic root of 1091207 is about 102.9522196460.

The spelling of 1091207 in words is "one million, ninety-one thousand, two hundred seven".