1123311245 has 16 divisors (see below), whose sum is σ = 1552307328. Its totient is φ = 764387520.

The previous prime is 1123311239. The next prime is 1123311247. The reversal of 1123311245 is 5421133211.

It is not a de Polignac number, because 1123311245 - 2¹² = 1123307149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123311245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123311247) 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, 117914 + ... + 127083.

It is an arithmetic number, because the mean of its divisors is an integer number (97019208).

Almost surely, 2^1123311245 is an apocalyptic number.

It is an amenable number.

1123311245 is a deficient number, since it is larger than the sum of its proper divisors (428996083).

1123311245 is a wasteful number, since it uses less digits than its factorization.

1123311245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245140.

The product of its digits is 720, while the sum is 23.

The square root of 1123311245 is about 33515.8357347687. The cubic root of 1123311245 is about 1039.5212432139.

Adding to 1123311245 its reverse (5421133211), we get a palindrome (6544444456).

The spelling of 1123311245 in words is "one billion, one hundred twenty-three million, three hundred eleven thousand, two hundred forty-five".