111245420 has 96 divisors (see below), whose sum is σ = 277978176. Its totient is φ = 36864000.

The previous prime is 111245419. The next prime is 111245447. The reversal of 111245420 is 24542111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111245392 and 111245401.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 277220 + ... + 277620.

It is an arithmetic number, because the mean of its divisors is an integer number (2895606).

Almost surely, 2^111245420 is an apocalyptic number.

111245420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111245420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138989088).

111245420 is an abundant number, since it is smaller than the sum of its proper divisors (166732756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111245420 is a wasteful number, since it uses less digits than its factorization.

111245420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 111245420 is about 10547.2944398078. The cubic root of 111245420 is about 480.9434857091.

Adding to 111245420 its reverse (24542111), we get a palindrome (135787531).

The spelling of 111245420 in words is "one hundred eleven million, two hundred forty-five thousand, four hundred twenty".