11124281 has 4 divisors (see below), whose sum is σ = 12713472. Its totient is φ = 9535092.

The previous prime is 11124277. The next prime is 11124283. The reversal of 11124281 is 18242111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11124281 - 2² = 11124277 is a prime.

It is a super-2 number, since 2×11124281² = 247499255533922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11124283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794585 + ... + 794598.

It is an arithmetic number, because the mean of its divisors is an integer number (3178368).

Almost surely, 2^11124281 is an apocalyptic number.

It is an amenable number.

11124281 is a deficient number, since it is larger than the sum of its proper divisors (1589191).

11124281 is an equidigital number, since it uses as much as digits as its factorization.

11124281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589190.

The product of its digits is 128, while the sum is 20.

The square root of 11124281 is about 3335.3082316332. The cubic root of 11124281 is about 223.2324454596.

Adding to 11124281 its reverse (18242111), we get a palindrome (29366392).

The spelling of 11124281 in words is "eleven million, one hundred twenty-four thousand, two hundred eighty-one".