120521520 has 200 divisors, whose sum is σ = 478567584. Its totient is φ = 27537408.

The previous prime is 120521507. The next prime is 120521537. The reversal of 120521520 is 25125021.

120521520 is a `hidden beast` number, since 120 + 5 + 21 + 520 = 666.

It is a super-2 number, since 2×120521520² = 29050873566220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 120521493 and 120521502.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 44032 + ... + 46688.

Almost surely, 2^120521520 is an apocalyptic number.

120521520 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 120521520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239283792).

120521520 is an abundant number, since it is smaller than the sum of its proper divisors (358046064).

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

120521520 is a wasteful number, since it uses less digits than its factorization.

120521520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689 (or 2674 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 120521520 is about 10978.2293654305. The cubic root of 120521520 is about 493.9559260673.

Adding to 120521520 its reverse (25125021), we get a palindrome (145646541).

The spelling of 120521520 in words is "one hundred twenty million, five hundred twenty-one thousand, five hundred twenty".