11161155 has 8 divisors (see below), whose sum is σ = 17857872. Its totient is φ = 5952608.

The previous prime is 11161153. The next prime is 11161159. The reversal of 11161155 is 55116111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11161155 - 2¹ = 11161153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11161153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372024 + ... + 372053.

It is an arithmetic number, because the mean of its divisors is an integer number (2232234).

Almost surely, 2^11161155 is an apocalyptic number.

11161155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11161155 is a deficient number, since it is larger than the sum of its proper divisors (6696717).

11161155 is an equidigital number, since it uses as much as digits as its factorization.

11161155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744085.

The product of its digits is 150, while the sum is 21.

The square root of 11161155 is about 3340.8314833287. The cubic root of 11161155 is about 223.4788252740.

Adding to 11161155 its reverse (55116111), we get a palindrome (66277266).

The spelling of 11161155 in words is "eleven million, one hundred sixty-one thousand, one hundred fifty-five".