11095561 has 3 divisors (see below), whose sum is σ = 11098893.
Its totient is φ = 11092230.
The previous prime is 11095559. The next prime is 11095571. The reversal of 11095561 is 16559011.
It can be divided in two parts, 1109 and 5561, that added together give a triangular number (6670 = T115).
The square root of 11095561 is 3331.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It is not a de Polignac number, because 11095561 - 21 = 11095559 is a prime.
It is a super-2 number, since 2×110955612 = 246222947809442, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (11095501) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1666 + ... + 4996.
It is an arithmetic number, because the mean of its divisors is an integer number (3699631).
Almost surely, 211095561 is an apocalyptic number.
11095561 is the 3331-st square number.
11095561 is the 1666-th centered octagonal number.
It is an amenable number.
11095561 is a deficient number, since it is larger than the sum of its proper divisors (3332).
11095561 is an frugal number, since it uses more digits than its factorization.
11095561 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6662 (or 3331 counting only the distinct ones).
The product of its (nonzero) digits is 1350, while the sum is 28.
The cubic root of 11095561 is about 223.0401705268.
The spelling of 11095561 in words is "eleven million, ninety-five thousand, five hundred sixty-one".