111771449 has 4 divisors (see below), whose sum is σ = 112088436. Its totient is φ = 111454464.

The previous prime is 111771431. The next prime is 111771463. The reversal of 111771449 is 944177111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944177111 = 79 ⋅11951609.

It can be written as a sum of positive squares in 2 ways, for example, as 67947049 + 43824400 = 8243^2 + 6620^2 .

It is a cyclic number.

It is not a de Polignac number, because 111771449 - 2²⁰ = 110722873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111771409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157964 + ... + 158669.

It is an arithmetic number, because the mean of its divisors is an integer number (28022109).

Almost surely, 2^111771449 is an apocalyptic number.

It is an amenable number.

111771449 is a deficient number, since it is larger than the sum of its proper divisors (316987).

111771449 is an equidigital number, since it uses as much as digits as its factorization.

111771449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316986.

The product of its digits is 7056, while the sum is 35.

The square root of 111771449 is about 10572.2017101453. The cubic root of 111771449 is about 481.7003483482.

The spelling of 111771449 in words is "one hundred eleven million, seven hundred seventy-one thousand, four hundred forty-nine".