1066191 has 12 divisors (see below), whose sum is σ = 1653912. Its totient is φ = 609168.

The previous prime is 1066159. The next prime is 1066217. The reversal of 1066191 is 1916601.

It is not a de Polignac number, because 1066191 - 2⁵ = 1066159 is a prime.

It is a super-2 number, since 2×1066191² = 2273526496962, which contains 22 as substring.

1066191 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3480 + ... + 3773.

It is an arithmetic number, because the mean of its divisors is an integer number (137826).

2^1066191 is an apocalyptic number.

1066191 is a deficient number, since it is larger than the sum of its proper divisors (587721).

1066191 is an equidigital number, since it uses as much as digits as its factorization.

1066191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7270 (or 7263 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1066191 is about 1032.5652521754. The cubic root of 1066191 is about 102.1594009004.

The spelling of 1066191 in words is "one million, sixty-six thousand, one hundred ninety-one".