1161135 has 40 divisors (see below), whose sum is σ = 2160576. Its totient is φ = 596160.

The previous prime is 1161113. The next prime is 1161137. The reversal of 1161135 is 5311611.

It is not a de Polignac number, because 1161135 - 2⁷ = 1161007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161137) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19005 + ... + 19065.

2^1161135 is an apocalyptic number.

1161135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161135 is a deficient number, since it is larger than the sum of its proper divisors (999441).

1161135 is an equidigital number, since it uses as much as digits as its factorization.

1161135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 116 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 1161135 is about 1077.5597431233. The cubic root of 1161135 is about 105.1060153724.

Adding to 1161135 its reverse (5311611), we get a palindrome (6472746).

It can be divided in two parts, 1161 and 135, that added together give a 4-th power (1296 = 6⁴).

The spelling of 1161135 in words is "one million, one hundred sixty-one thousand, one hundred thirty-five".