1161225236 has 6 divisors (see below), whose sum is σ = 2032144170. Its totient is φ = 580612616.

The previous prime is 1161225227. The next prime is 1161225253. The reversal of 1161225236 is 6325221611.

It can be written as a sum of positive squares in only one way, i.e., 1082015236 + 79210000 = 32894^2 + 8900^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1161225199 and 1161225208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145153151 + ... + 145153158.

It is an arithmetic number, because the mean of its divisors is an integer number (338690695).

Almost surely, 2^1161225236 is an apocalyptic number.

It is an amenable number.

1161225236 is a deficient number, since it is larger than the sum of its proper divisors (870918934).

1161225236 is a wasteful number, since it uses less digits than its factorization.

1161225236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290306313 (or 290306311 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 1161225236 is about 34076.7550685214. The cubic root of 1161225236 is about 1051.0873802472.

Adding to 1161225236 its reverse (6325221611), we get a palindrome (7486446847).

The spelling of 1161225236 in words is "one billion, one hundred sixty-one million, two hundred twenty-five thousand, two hundred thirty-six".