120561105 has 32 divisors (see below), whose sum is σ = 221762304. Its totient is φ = 54786816.

The previous prime is 120561079. The next prime is 120561143. The reversal of 120561105 is 501165021.

It is not a de Polignac number, because 120561105 - 2¹⁹ = 120036817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 31 ways as a sum of consecutive naturals, for example, 14847 + ... + 21483.

It is an arithmetic number, because the mean of its divisors is an integer number (6930072).

Almost surely, 2^120561105 is an apocalyptic number.

120561105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120561105 is a deficient number, since it is larger than the sum of its proper divisors (101201199).

120561105 is a wasteful number, since it uses less digits than its factorization.

120561105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6825.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 120561105 is about 10980.0321037782. The cubic root of 120561105 is about 494.0099996883.

The spelling of 120561105 in words is "one hundred twenty million, five hundred sixty-one thousand, one hundred five".