11161685 has 4 divisors (see below), whose sum is σ = 13394028. Its totient is φ = 8929344.

The previous prime is 11161681. The next prime is 11161687. The reversal of 11161685 is 58616111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58616111 = 2237 ⋅26203.

It can be written as a sum of positive squares in 2 ways, for example, as 5276209 + 5885476 = 2297^2 + 2426^2 .

It is a cyclic number.

It is not a de Polignac number, because 11161685 - 2² = 11161681 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11161681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116164 + ... + 1116173.

It is an arithmetic number, because the mean of its divisors is an integer number (3348507).

Almost surely, 2^11161685 is an apocalyptic number.

It is an amenable number.

11161685 is a deficient number, since it is larger than the sum of its proper divisors (2232343).

11161685 is an equidigital number, since it uses as much as digits as its factorization.

11161685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232342.

The product of its digits is 1440, while the sum is 29.

The square root of 11161685 is about 3340.9108039575. The cubic root of 11161685 is about 223.4823625991.

Adding to 11161685 its reverse (58616111), we get a palindrome (69777796).

The spelling of 11161685 in words is "eleven million, one hundred sixty-one thousand, six hundred eighty-five".