111255421 has 4 divisors (see below), whose sum is σ = 111316572. Its totient is φ = 111194272.

The previous prime is 111255407. The next prime is 111255449. The reversal of 111255421 is 124552111.

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 65205625 + 46049796 = 8075^2 + 6786^2 .

It is a cyclic number.

It is not a de Polignac number, because 111255421 - 2⁹ = 111254909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111255392 and 111255401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111255401) 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, 27760 + ... + 31513.

It is an arithmetic number, because the mean of its divisors is an integer number (27829143).

Almost surely, 2^111255421 is an apocalyptic number.

It is an amenable number.

111255421 is a deficient number, since it is larger than the sum of its proper divisors (61151).

111255421 is an equidigital number, since it uses as much as digits as its factorization.

111255421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61150.

The product of its digits is 400, while the sum is 22.

The square root of 111255421 is about 10547.7685317796. The cubic root of 111255421 is about 480.9578976033.

The spelling of 111255421 in words is "one hundred eleven million, two hundred fifty-five thousand, four hundred twenty-one".