111432420 has 144 divisors (see below), whose sum is σ = 372048768. Its totient is φ = 26772480.

The previous prime is 111432407. The next prime is 111432437. The reversal of 111432420 is 24234111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111432393 and 111432402.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 330492 + ... + 330828.

It is an arithmetic number, because the mean of its divisors is an integer number (2583672).

Almost surely, 2^111432420 is an apocalyptic number.

111432420 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 111432420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186024384).

111432420 is an abundant number, since it is smaller than the sum of its proper divisors (260616348).

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

111432420 is a wasteful number, since it uses less digits than its factorization.

111432420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 111432420 is about 10556.1555501991. The cubic root of 111432420 is about 481.2128184014.

Adding to 111432420 its reverse (24234111), we get a palindrome (135666531).

The spelling of 111432420 in words is "one hundred eleven million, four hundred thirty-two thousand, four hundred twenty".