111421544 has 32 divisors (see below), whose sum is σ = 227073000. Its totient is φ = 50948352.

The previous prime is 111421511. The next prime is 111421577. The reversal of 111421544 is 445124111.

It is an interprime number because it is at equal distance from previous prime (111421511) and next prime (111421577).

It can be written as a sum of positive squares in 4 ways, for example, as 104816644 + 6604900 = 10238^2 + 2570^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6422 + ... + 16250.

Almost surely, 2^111421544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111421544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113536500).

111421544 is an abundant number, since it is smaller than the sum of its proper divisors (115651456).

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

111421544 is a wasteful number, since it uses less digits than its factorization.

111421544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9957 (or 9953 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 111421544 is about 10555.6403879632. The cubic root of 111421544 is about 481.1971621531.

Adding to 111421544 its reverse (445124111), we get a palindrome (556545655).

The spelling of 111421544 in words is "one hundred eleven million, four hundred twenty-one thousand, five hundred forty-four".