120105520 has 40 divisors (see below), whose sum is σ = 279736560. Its totient is φ = 47957760.

The previous prime is 120105481. The next prime is 120105547. The reversal of 120105520 is 25501021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 120105494 and 120105503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65415 + ... + 67225.

It is an arithmetic number, because the mean of its divisors is an integer number (6993414).

Almost surely, 2^120105520 is an apocalyptic number.

120105520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120105520 is an abundant number, since it is smaller than the sum of its proper divisors (159631040).

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

120105520 is a wasteful number, since it uses less digits than its factorization.

120105520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653 (or 2647 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 120105520 is about 10959.2663988061. The cubic root of 120105520 is about 493.3869473426.

Adding to 120105520 its reverse (25501021), we get a palindrome (145606541).

The spelling of 120105520 in words is "one hundred twenty million, one hundred five thousand, five hundred twenty".