112721920 has 80 divisors (see below), whose sum is σ = 276823800. Its totient is φ = 44040192.

The previous prime is 112721893. The next prime is 112721929. The reversal of 112721920 is 29127211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112721929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2621419 + ... + 2621461.

Almost surely, 2^112721920 is an apocalyptic number.

112721920 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 112721920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138411900).

112721920 is an abundant number, since it is smaller than the sum of its proper divisors (164101880).

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

112721920 is an frugal number, since it uses more digits than its factorization.

112721920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 112721920 is about 10617.0579729038. The cubic root of 112721920 is about 483.0619081144.

The spelling of 112721920 in words is "one hundred twelve million, seven hundred twenty-one thousand, nine hundred twenty".