113421280 has 288 divisors, whose sum is σ = 353699136. Its totient is φ = 34062336.

The previous prime is 113421271. The next prime is 113421289. The reversal of 113421280 is 82124311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (113421271) and next prime (113421289).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113421289) 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 47 ways as a sum of consecutive naturals, for example, 3065422 + ... + 3065458.

It is an arithmetic number, because the mean of its divisors is an integer number (1228122).

Almost surely, 2^113421280 is an apocalyptic number.

113421280 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 113421280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176849568).

113421280 is an abundant number, since it is smaller than the sum of its proper divisors (240277856).

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

113421280 is a wasteful number, since it uses less digits than its factorization.

113421280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 113421280 is about 10649.9427228507. The cubic root of 113421280 is about 484.0588685994.

Adding to 113421280 its reverse (82124311), we get a palindrome (195545591).

The spelling of 113421280 in words is "one hundred thirteen million, four hundred twenty-one thousand, two hundred eighty".