11381156 has 12 divisors (see below), whose sum is σ = 20214768. Its totient is φ = 5605512.

The previous prime is 11381147. The next prime is 11381173. The reversal of 11381156 is 65118311.

11381156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20966 + ... + 21501.

It is an arithmetic number, because the mean of its divisors is an integer number (1684564).

Almost surely, 2^11381156 is an apocalyptic number.

It is an amenable number.

11381156 is a deficient number, since it is larger than the sum of its proper divisors (8833612).

11381156 is a wasteful number, since it uses less digits than its factorization.

11381156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42538 (or 42536 counting only the distinct ones).

The product of its digits is 720, while the sum is 26.

The square root of 11381156 is about 3373.5968935248. The cubic root of 11381156 is about 224.9376353905.

Adding to 11381156 its reverse (65118311), we get a palindrome (76499467).

The spelling of 11381156 in words is "eleven million, three hundred eighty-one thousand, one hundred fifty-six".