111421775 has 24 divisors (see below), whose sum is σ = 145597824. Its totient is φ = 84418400.

The previous prime is 111421769. The next prime is 111421777. The reversal of 111421775 is 577124111.

It is not a de Polignac number, because 111421775 - 2⁴ = 111421759 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111421777) 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 23 ways as a sum of consecutive naturals, for example, 60620 + ... + 62430.

It is an arithmetic number, because the mean of its divisors is an integer number (6066576).

Almost surely, 2^111421775 is an apocalyptic number.

111421775 is a deficient number, since it is larger than the sum of its proper divisors (34176049).

111421775 is a wasteful number, since it uses less digits than its factorization.

111421775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951 (or 1946 counting only the distinct ones).

The product of its digits is 1960, while the sum is 29.

The square root of 111421775 is about 10555.6513299749. The cubic root of 111421775 is about 481.1974946934.

Adding to 111421775 its reverse (577124111), we get a palindrome (688545886).

The spelling of 111421775 in words is "one hundred eleven million, four hundred twenty-one thousand, seven hundred seventy-five".