111444541 has 4 divisors (see below), whose sum is σ = 120017212. Its totient is φ = 102871872.

The previous prime is 111444539. The next prime is 111444581. The reversal of 111444541 is 145444111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145444111 = 23 ⋅6323657.

It can be written as a sum of positive squares in 2 ways, for example, as 6812100 + 104632441 = 2610^2 + 10229^2 .

It is a cyclic number.

It is not a de Polignac number, because 111444541 - 2¹ = 111444539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111444521) 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, 4286316 + ... + 4286341.

It is an arithmetic number, because the mean of its divisors is an integer number (30004303).

Almost surely, 2^111444541 is an apocalyptic number.

It is an amenable number.

111444541 is a deficient number, since it is larger than the sum of its proper divisors (8572671).

111444541 is an equidigital number, since it uses as much as digits as its factorization.

111444541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8572670.

The product of its digits is 1280, while the sum is 25.

The square root of 111444541 is about 10556.7296545853. The cubic root of 111444541 is about 481.2302656550.

Adding to 111444541 its reverse (145444111), we get a palindrome (256888652).

The spelling of 111444541 in words is "one hundred eleven million, four hundred forty-four thousand, five hundred forty-one".