11861156 has 6 divisors (see below), whose sum is σ = 20757030. Its totient is φ = 5930576.

The previous prime is 11861141. The next prime is 11861159. The reversal of 11861156 is 65116811.

It can be written as a sum of positive squares in only one way, i.e., 11833600 + 27556 = 3440^2 + 166^2 .

It is not an unprimeable number, because it can be changed into a prime (11861159) by changing a digit.

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, 1482641 + ... + 1482648.

It is an arithmetic number, because the mean of its divisors is an integer number (3459505).

Almost surely, 2^11861156 is an apocalyptic number.

It is an amenable number.

11861156 is a deficient number, since it is larger than the sum of its proper divisors (8895874).

11861156 is a wasteful number, since it uses less digits than its factorization.

11861156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965293 (or 2965291 counting only the distinct ones).

The product of its digits is 1440, while the sum is 29.

The square root of 11861156 is about 3444.0029035992. The cubic root of 11861156 is about 228.0564392955.

Adding to 11861156 its reverse (65116811), we get a palindrome (76977967).

The spelling of 11861156 in words is "eleven million, eight hundred sixty-one thousand, one hundred fifty-six".