113521240 has 96 divisors (see below), whose sum is σ = 314694720. Its totient is φ = 36621312.

The previous prime is 113521207. The next prime is 113521241. The reversal of 113521240 is 42125311.

It is a super-2 number, since 2×113521240² = 25774143862275200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113521241) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 31617 + ... + 35023.

It is an arithmetic number, because the mean of its divisors is an integer number (3278070).

Almost surely, 2^113521240 is an apocalyptic number.

113521240 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 113521240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157347360).

113521240 is an abundant number, since it is smaller than the sum of its proper divisors (201173480).

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

113521240 is a wasteful number, since it uses less digits than its factorization.

113521240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449 (or 3438 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 113521240 is about 10654.6346722917. The cubic root of 113521240 is about 484.2010298025.

Adding to 113521240 its reverse (42125311), we get a palindrome (155646551).

The spelling of 113521240 in words is "one hundred thirteen million, five hundred twenty-one thousand, two hundred forty".