111421249 has 4 divisors (see below), whose sum is σ = 111448260. Its totient is φ = 111394240.

The previous prime is 111421243. The next prime is 111421253. The reversal of 111421249 is 942124111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72795024 + 38626225 = 8532^2 + 6215^2 .

It is a cyclic number.

It is not a de Polignac number, because 111421249 - 2¹¹ = 111419201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111421243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5884 + ... + 16045.

It is an arithmetic number, because the mean of its divisors is an integer number (27862065).

Almost surely, 2^111421249 is an apocalyptic number.

It is an amenable number.

111421249 is a deficient number, since it is larger than the sum of its proper divisors (27011).

111421249 is an equidigital number, since it uses as much as digits as its factorization.

111421249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27010.

The product of its digits is 576, while the sum is 25.

The square root of 111421249 is about 10555.6264143820. The cubic root of 111421249 is about 481.1967374797.

The spelling of 111421249 in words is "one hundred eleven million, four hundred twenty-one thousand, two hundred forty-nine".