111405072 has 40 divisors (see below), whose sum is σ = 297084160. Its totient is φ = 35936640.

The previous prime is 111405061. The next prime is 111405101. The reversal of 111405072 is 270504111.

It is a happy number.

It is a super-2 number, since 2×111405072² = 24822180134650368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35947 + ... + 38922.

It is an arithmetic number, because the mean of its divisors is an integer number (7427104).

Almost surely, 2^111405072 is an apocalyptic number.

111405072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111405072 is an abundant number, since it is smaller than the sum of its proper divisors (185679088).

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

111405072 is a wasteful number, since it uses less digits than its factorization.

111405072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74911 (or 74905 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 111405072 is about 10554.8601127632. The cubic root of 111405072 is about 481.1734483960.

Adding to 111405072 its reverse (270504111), we get a palindrome (381909183).

The spelling of 111405072 in words is "one hundred eleven million, four hundred five thousand, seventy-two".