111405252 has 24 divisors (see below), whose sum is σ = 297080896. Its totient is φ = 31830048.

The previous prime is 111405251. The next prime is 111405277. The reversal of 111405252 is 252504111.

It is a super-2 number, since 2×111405252² = 24822260346367008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (111405251) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 663043 + ... + 663210.

Almost surely, 2^111405252 is an apocalyptic number.

111405252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111405252 is an abundant number, since it is smaller than the sum of its proper divisors (185675644).

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

111405252 is a wasteful number, since it uses less digits than its factorization.

111405252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326267 (or 1326265 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 111405252 is about 10554.8686396373. The cubic root of 111405252 is about 481.1737075440.

Adding to 111405252 its reverse (252504111), we get a palindrome (363909363).

The spelling of 111405252 in words is "one hundred eleven million, four hundred five thousand, two hundred fifty-two".