111424240 has 20 divisors (see below), whose sum is σ = 259061544. Its totient is φ = 44569664.

The previous prime is 111424231. The next prime is 111424241. The reversal of 111424240 is 42424111.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×111424240² = 24830722519155200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111424241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696322 + ... + 696481.

Almost surely, 2^111424240 is an apocalyptic number.

111424240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111424240 is an abundant number, since it is smaller than the sum of its proper divisors (147637304).

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

111424240 is a wasteful number, since it uses less digits than its factorization.

111424240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392816 (or 1392810 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 111424240 is about 10555.7680914275. The cubic root of 111424240 is about 481.2010432011.

Adding to 111424240 its reverse (42424111), we get a palindrome (153848351).

The spelling of 111424240 in words is "one hundred eleven million, four hundred twenty-four thousand, two hundred forty".