721411120 has 80 divisors (see below), whose sum is σ = 1718247168. Its totient is φ = 281603840.

The previous prime is 721411091. The next prime is 721411139. The reversal of 721411120 is 21114127.

721411120 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

721411120 is a nontrivial binomial coefficient, being equal to C(37985, 2).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 607167 + ... + 608353.

Almost surely, 2^721411120 is an apocalyptic number.

721411120 is the 37984-th triangular number.

721411120 is the 12662-nd centered nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721411120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859123584).

721411120 is an abundant number, since it is smaller than the sum of its proper divisors (996836048).

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

721411120 is a wasteful number, since it uses less digits than its factorization.

721411120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 721411120 is about 26859.0975276535. The cubic root of 721411120 is about 896.8661042229.

Adding to 721411120 its reverse (21114127), we get a palindrome (742525247).

The spelling of 721411120 in words is "seven hundred twenty-one million, four hundred eleven thousand, one hundred twenty".