120256305 has 32 divisors (see below), whose sum is σ = 216228096. Its totient is φ = 56626944.

The previous prime is 120256289. The next prime is 120256313. The reversal of 120256305 is 503652021.

It is not a de Polignac number, because 120256305 - 2⁴ = 120256289 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8922 + ... + 17891.

It is an arithmetic number, because the mean of its divisors is an integer number (6757128).

Almost surely, 2^120256305 is an apocalyptic number.

120256305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120256305 is a deficient number, since it is larger than the sum of its proper divisors (95971791).

120256305 is a wasteful number, since it uses less digits than its factorization.

120256305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26857.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 120256305 is about 10966.1435792169. The cubic root of 120256305 is about 493.5933331929.

The spelling of 120256305 in words is "one hundred twenty million, two hundred fifty-six thousand, three hundred five".