1161111 has 8 divisors (see below), whose sum is σ = 1769344. Its totient is φ = 663480.

The previous prime is 1161107. The next prime is 1161113. The reversal of 1161111 is 1111611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1161111 - 2² = 1161107 is a prime.

It is a Duffinian number.

1161111 is a modest number, since divided by 1111 gives 116 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27625 + ... + 27666.

It is an arithmetic number, because the mean of its divisors is an integer number (221168).

2^1161111 is an apocalyptic number.

1161111 is a deficient number, since it is larger than the sum of its proper divisors (608233).

1161111 is an equidigital number, since it uses as much as digits as its factorization.

1161111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55301.

The product of its digits is 6, while the sum is 12.

The square root of 1161111 is about 1077.5486067923. The cubic root of 1161111 is about 105.1052912069.

Adding to 1161111 its reverse (1111611), we get a palindrome (2272722).

It can be divided in two parts, 11611 and 11, that multiplied together give a palindrome (127721).

The spelling of 1161111 in words is "one million, one hundred sixty-one thousand, one hundred eleven".