11287181 has 8 divisors (see below), whose sum is σ = 11834880. Its totient is φ = 10744272.

The previous prime is 11287163. The next prime is 11287189. The reversal of 11287181 is 18178211.

11287181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11287181 - 2⁶ = 11287117 is a prime.

It is a super-2 number, since 2×11287181² = 254800909853522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11287189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4196 + ... + 6338.

It is an arithmetic number, because the mean of its divisors is an integer number (1479360).

Almost surely, 2^11287181 is an apocalyptic number.

It is an amenable number.

11287181 is a deficient number, since it is larger than the sum of its proper divisors (547699).

11287181 is a wasteful number, since it uses less digits than its factorization.

11287181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395.

The product of its digits is 896, while the sum is 29.

The square root of 11287181 is about 3359.6400104773. The cubic root of 11287181 is about 224.3168149342.

The spelling of 11287181 in words is "eleven million, two hundred eighty-seven thousand, one hundred eighty-one".