120643560 has 128 divisors (see below), whose sum is σ = 425865600. Its totient is φ = 30274560.

The previous prime is 120643553. The next prime is 120643561. The reversal of 120643560 is 65346021.

120643560 is a `hidden beast` number, since 12 + 0 + 643 + 5 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120643561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15075 + ... + 21645.

It is an arithmetic number, because the mean of its divisors is an integer number (3327075).

Almost surely, 2^120643560 is an apocalyptic number.

120643560 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 120643560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212932800).

120643560 is an abundant number, since it is smaller than the sum of its proper divisors (305222040).

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

120643560 is a wasteful number, since it uses less digits than its factorization.

120643560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6608 (or 6598 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 120643560 is about 10983.7862324428. The cubic root of 120643560 is about 494.1225962890.

Adding to 120643560 its reverse (65346021), we get a palindrome (185989581).

The spelling of 120643560 in words is "one hundred twenty million, six hundred forty-three thousand, five hundred sixty".