111111445 has 8 divisors (see below), whose sum is σ = 133425720. Its totient is φ = 88827840.

The previous prime is 111111443. The next prime is 111111467. The reversal of 111111445 is 544111111.

It can be written as a sum of positive squares in 4 ways, for example, as 42536484 + 68574961 = 6522^2 + 8281^2 .

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

It is not a de Polignac number, because 111111445 - 2¹ = 111111443 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111443) 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, 1251 + ... + 14959.

It is an arithmetic number, because the mean of its divisors is an integer number (16678215).

Almost surely, 2^111111445 is an apocalyptic number.

It is an amenable number.

111111445 is a deficient number, since it is larger than the sum of its proper divisors (22314275).

111111445 is a wasteful number, since it uses less digits than its factorization.

111111445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15335.

The product of its digits is 80, while the sum is 19.

The square root of 111111445 is about 10540.9413716233. The cubic root of 111111445 is about 480.7503383198.

Adding to 111111445 its reverse (544111111), we get a palindrome (655222556).

It can be divided in two parts, 111111 and 445, that added together give a square (111556 = 334²).

The spelling of 111111445 in words is "one hundred eleven million, one hundred eleven thousand, four hundred forty-five".