111243400 has 48 divisors (see below), whose sum is σ = 260446500. Its totient is φ = 44186880.

The previous prime is 111243389. The next prime is 111243403. The reversal of 111243400 is 4342111.

It can be written as a sum of positive squares in 6 ways, for example, as 21031396 + 90212004 = 4586^2 + 9498^2 .

It is not an unprimeable number, because it can be changed into a prime (111243403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27934 + ... + 31666.

Almost surely, 2^111243400 is an apocalyptic number.

111243400 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 111243400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130223250).

111243400 is an abundant number, since it is smaller than the sum of its proper divisors (149203100).

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

111243400 is a wasteful number, since it uses less digits than its factorization.

111243400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3898 (or 3889 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 111243400 is about 10547.1986802184. The cubic root of 111243400 is about 480.9405746927.

Adding to 111243400 its reverse (4342111), we get a palindrome (115585511).

The spelling of 111243400 in words is "one hundred eleven million, two hundred forty-three thousand, four hundred".