120561630 has 128 divisors (see below), whose sum is σ = 349747200. Its totient is φ = 26002944.

The previous prime is 120561629. The next prime is 120561673. The reversal of 120561630 is 36165021.

It is a self number, because there is not a number n which added to its sum of digits gives 120561630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 526356 + ... + 526584.

It is an arithmetic number, because the mean of its divisors is an integer number (2732400).

Almost surely, 2^120561630 is an apocalyptic number.

120561630 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 120561630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174873600).

120561630 is an abundant number, since it is smaller than the sum of its proper divisors (229185570).

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

120561630 is a wasteful number, since it uses less digits than its factorization.

120561630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 120561630 is about 10980.0560107861. The cubic root of 120561630 is about 494.0107167655.

It can be divided in two parts, 1205 and 61630, that added together give a triangular number (62835 = T₃₅₄).

The spelling of 120561630 in words is "one hundred twenty million, five hundred sixty-one thousand, six hundred thirty".