11161225 has 12 divisors (see below), whose sum is σ = 14178780. Its totient is φ = 8710400.

The previous prime is 11161219. The next prime is 11161229. The reversal of 11161225 is 52216111.

It can be written as a sum of positive squares in 6 ways, for example, as 4946176 + 6215049 = 2224^2 + 2493^2 .

It is not a de Polignac number, because 11161225 - 2⁷ = 11161097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11161229) 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 11 ways as a sum of consecutive naturals, for example, 4420 + ... + 6469.

It is an arithmetic number, because the mean of its divisors is an integer number (1181565).

Almost surely, 2^11161225 is an apocalyptic number.

It is an amenable number.

11161225 is a deficient number, since it is larger than the sum of its proper divisors (3017555).

11161225 is a wasteful number, since it uses less digits than its factorization.

11161225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10940 (or 10935 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 11161225 is about 3340.8419597461. The cubic root of 11161225 is about 223.4792924743.

Adding to 11161225 its reverse (52216111), we get a palindrome (63377336).

The spelling of 11161225 in words is "eleven million, one hundred sixty-one thousand, two hundred twenty-five".