111405441 has 16 divisors (see below), whose sum is σ = 170177408. Its totient is φ = 63504000.

The previous prime is 111405439. The next prime is 111405451. The reversal of 111405441 is 144504111.

It is not a de Polignac number, because 111405441 - 2¹ = 111405439 is a prime.

It is a super-2 number, since 2×111405441² = 24822344568808962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111405401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2541 + ... + 15141.

It is an arithmetic number, because the mean of its divisors is an integer number (10636088).

Almost surely, 2^111405441 is an apocalyptic number.

It is an amenable number.

111405441 is a deficient number, since it is larger than the sum of its proper divisors (58771967).

111405441 is a wasteful number, since it uses less digits than its factorization.

111405441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13032.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 111405441 is about 10554.8775928478. The cubic root of 111405441 is about 481.1739796490.

Adding to 111405441 its reverse (144504111), we get a palindrome (255909552).

The spelling of 111405441 in words is "one hundred eleven million, four hundred five thousand, four hundred forty-one".