12161135 has 16 divisors (see below), whose sum is σ = 17404416. Its totient is φ = 7975968.

The previous prime is 12161119. The next prime is 12161141. The reversal of 12161135 is 53116121.

It is not a de Polignac number, because 12161135 - 2⁴ = 12161119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6749 + ... + 8358.

It is an arithmetic number, because the mean of its divisors is an integer number (1087776).

Almost surely, 2^12161135 is an apocalyptic number.

12161135 is a deficient number, since it is larger than the sum of its proper divisors (5243281).

12161135 is a wasteful number, since it uses less digits than its factorization.

12161135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15142.

The product of its digits is 180, while the sum is 20.

The square root of 12161135 is about 3487.2818928214. The cubic root of 12161135 is about 229.9630375385.

Adding to 12161135 its reverse (53116121), we get a palindrome (65277256).

The spelling of 12161135 in words is "twelve million, one hundred sixty-one thousand, one hundred thirty-five".