120255665 has 32 divisors (see below), whose sum is σ = 154828800. Its totient is φ = 89510400.

The previous prime is 120255659. The next prime is 120255673. The reversal of 120255665 is 566552021.

120255665 = T₂₇₀ + T₂₇₁ + ... + T₉₀₄.

It is not a de Polignac number, because 120255665 - 2⁸ = 120255409 is a prime.

It is a super-2 number, since 2×120255665² = 28922849929184450, which contains 22 as substring.

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, 807011 + ... + 807159.

It is an arithmetic number, because the mean of its divisors is an integer number (4838400).

Almost surely, 2^120255665 is an apocalyptic number.

It is an amenable number.

120255665 is a deficient number, since it is larger than the sum of its proper divisors (34573135).

120255665 is a wasteful number, since it uses less digits than its factorization.

120255665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 120255665 is about 10966.1143984549. The cubic root of 120255665 is about 493.5924575624.

The spelling of 120255665 in words is "one hundred twenty million, two hundred fifty-five thousand, six hundred sixty-five".