11165641 has 4 divisors (see below), whose sum is σ = 11180032. Its totient is φ = 11151252.

The previous prime is 11165639. The next prime is 11165657. The reversal of 11165641 is 14656111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14656111 = 107 ⋅136973.

It is a cyclic number.

It is not a de Polignac number, because 11165641 - 2¹ = 11165639 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11165621) 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, 5961 + ... + 7606.

It is an arithmetic number, because the mean of its divisors is an integer number (2795008).

Almost surely, 2^11165641 is an apocalyptic number.

It is an amenable number.

11165641 is a deficient number, since it is larger than the sum of its proper divisors (14391).

11165641 is an equidigital number, since it uses as much as digits as its factorization.

11165641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14390.

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

The square root of 11165641 is about 3341.5028056250. The cubic root of 11165641 is about 223.5087621914.

The spelling of 11165641 in words is "eleven million, one hundred sixty-five thousand, six hundred forty-one".