1091201 has 4 divisors (see below), whose sum is σ = 1104432. Its totient is φ = 1077972.

The previous prime is 1091191. The next prime is 1091219. The reversal of 1091201 is 1021901.

1091201 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1021901 = 431 ⋅2371.

It is a cyclic number.

It is not a de Polignac number, because 1091201 - 2⁶ = 1091137 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6491 + ... + 6656.

It is an arithmetic number, because the mean of its divisors is an integer number (276108).

2^1091201 is an apocalyptic number.

It is an amenable number.

1091201 is a deficient number, since it is larger than the sum of its proper divisors (13231).

1091201 is an equidigital number, since it uses as much as digits as its factorization.

1091201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13230.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1091201 is about 1044.6056672257. The cubic root of 1091201 is about 102.9520309515.

The spelling of 1091201 in words is "one million, ninety-one thousand, two hundred one".