1071091 has 6 divisors (see below), whose sum is σ = 1246020. Its totient is φ = 918036.

The previous prime is 1071067. The next prime is 1071121. The reversal of 1071091 is 1901701.

It is a happy number.

It is not a de Polignac number, because 1071091 - 2⁹ = 1070579 is a prime.

It is a super-2 number, since 2×1071091² = 2294471860562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1071061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10881 + ... + 10978.

It is an arithmetic number, because the mean of its divisors is an integer number (207670).

2^1071091 is an apocalyptic number.

1071091 is a deficient number, since it is larger than the sum of its proper divisors (174929).

1071091 is an equidigital number, since it uses as much as digits as its factorization.

1071091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21873 (or 21866 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 19.

The square root of 1071091 is about 1034.9352636759. The cubic root of 1071091 is about 102.3156631335.

Adding to 1071091 its reverse (1901701), we get a palindrome (2972792).

It can be divided in two parts, 10710 and 91, that added together give a palindrome (10801).

The spelling of 1071091 in words is "one million, seventy-one thousand, ninety-one".