120505305 has 16 divisors (see below), whose sum is σ = 196447680. Its totient is φ = 63056448.

The previous prime is 120505291. The next prime is 120505327. The reversal of 120505305 is 503505021.

It is not a de Polignac number, because 120505305 - 2¹⁰ = 120504281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74995 + ... + 76584.

It is an arithmetic number, because the mean of its divisors is an integer number (12277980).

Almost surely, 2^120505305 is an apocalyptic number.

120505305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120505305 is a deficient number, since it is larger than the sum of its proper divisors (75942375).

120505305 is a wasteful number, since it uses less digits than its factorization.

120505305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151640.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 120505305 is about 10977.4908335193. The cubic root of 120505305 is about 493.9337727496.

The spelling of 120505305 in words is "one hundred twenty million, five hundred five thousand, three hundred five".