11123555 has 8 divisors (see below), whose sum is σ = 13418592. Its totient is φ = 8851968.

The previous prime is 11123551. The next prime is 11123557. The reversal of 11123555 is 55532111.

It is a happy number.

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 11123555 - 2² = 11123551 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 11123555.

It is not an unprimeable number, because it can be changed into a prime (11123551) 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, 4799 + ... + 6728.

It is an arithmetic number, because the mean of its divisors is an integer number (1677324).

Almost surely, 2^11123555 is an apocalyptic number.

11123555 is a deficient number, since it is larger than the sum of its proper divisors (2295037).

11123555 is a wasteful number, since it uses less digits than its factorization.

11123555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11725.

The product of its digits is 750, while the sum is 23.

The square root of 11123555 is about 3335.1993943391. The cubic root of 11123555 is about 223.2275891073.

Adding to 11123555 its reverse (55532111), we get a palindrome (66655666).

The spelling of 11123555 in words is "eleven million, one hundred twenty-three thousand, five hundred fifty-five".