120521664 has 84 divisors (see below), whose sum is σ = 349483680. Its totient is φ = 39705600.

The previous prime is 120521663. The next prime is 120521683. The reversal of 120521664 is 466125021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120521663) 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, 50089 + ... + 52439.

It is an arithmetic number, because the mean of its divisors is an integer number (4160520).

Almost surely, 2^120521664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120521664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174741840).

120521664 is an abundant number, since it is smaller than the sum of its proper divisors (228962016).

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

120521664 is a wasteful number, since it uses less digits than its factorization.

120521664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458 (or 2445 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 120521664 is about 10978.2359238632. The cubic root of 120521664 is about 493.9561227946.

Adding to 120521664 its reverse (466125021), we get a palindrome (586646685).

The spelling of 120521664 in words is "one hundred twenty million, five hundred twenty-one thousand, six hundred sixty-four".