120945665 has 4 divisors (see below), whose sum is σ = 145134804. Its totient is φ = 96756528.

The previous prime is 120945641. The next prime is 120945673. The reversal of 120945665 is 566549021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566549021 = 17 ⋅33326413.

It can be written as a sum of positive squares in 2 ways, for example, as 12931216 + 108014449 = 3596^2 + 10393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120945665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12094562 + ... + 12094571.

It is an arithmetic number, because the mean of its divisors is an integer number (36283701).

Almost surely, 2^120945665 is an apocalyptic number.

It is an amenable number.

120945665 is a deficient number, since it is larger than the sum of its proper divisors (24189139).

120945665 is an equidigital number, since it uses as much as digits as its factorization.

120945665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24189138.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 120945665 is about 10997.5299499479. The cubic root of 120945665 is about 494.5346986229.

The spelling of 120945665 in words is "one hundred twenty million, nine hundred forty-five thousand, six hundred sixty-five".