11123287 has 16 divisors (see below), whose sum is σ = 13554432. Its totient is φ = 8910720.

The previous prime is 11123263. The next prime is 11123311. The reversal of 11123287 is 78232111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11123263) and next prime (11123311).

It is a de Polignac number, because none of the positive numbers 2^k-11123287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24888 + ... + 25330.

It is an arithmetic number, because the mean of its divisors is an integer number (847152).

Almost surely, 2^11123287 is an apocalyptic number.

11123287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11123287 is a deficient number, since it is larger than the sum of its proper divisors (2431145).

11123287 is a wasteful number, since it uses less digits than its factorization.

11123287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678.

The product of its digits is 672, while the sum is 25.

The square root of 11123287 is about 3335.1592165892. The cubic root of 11123287 is about 223.2257963509.

Adding to 11123287 its reverse (78232111), we get a palindrome (89355398).

The spelling of 11123287 in words is "eleven million, one hundred twenty-three thousand, two hundred eighty-seven".