8161135 has 4 divisors (see below), whose sum is σ = 9793368. Its totient is φ = 6528904.

The previous prime is 8161121. The next prime is 8161183. The reversal of 8161135 is 5311618.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8161135 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816109 + ... + 816118.

It is an arithmetic number, because the mean of its divisors is an integer number (2448342).

Almost surely, 2^8161135 is an apocalyptic number.

8161135 is a deficient number, since it is larger than the sum of its proper divisors (1632233).

8161135 is a wasteful number, since it uses less digits than its factorization.

8161135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632232.

The product of its digits is 720, while the sum is 25.

The square root of 8161135 is about 2856.7700292463. The cubic root of 8161135 is about 201.3338757667. Note that the first 3 decimals are identical.

It can be divided in two parts, 81 and 61135, that added together give a palindrome (61216).

The spelling of 8161135 in words is "eight million, one hundred sixty-one thousand, one hundred thirty-five".