120561210 has 160 divisors (see below), whose sum is σ = 404376192. Its totient is φ = 25038720.

The previous prime is 120561143. The next prime is 120561241. The reversal of 120561210 is 12165021.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 61404 + ... + 63336.

Almost surely, 2^120561210 is an apocalyptic number.

120561210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 120561210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202188096).

120561210 is an abundant number, since it is smaller than the sum of its proper divisors (283814982).

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

120561210 is a wasteful number, since it uses less digits than its factorization.

120561210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970 (or 1961 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 120561210 is about 10980.0368851839. The cubic root of 120561210 is about 494.0101431039.

The spelling of 120561210 in words is "one hundred twenty million, five hundred sixty-one thousand, two hundred ten".