120745717 has 4 divisors (see below), whose sum is σ = 121514956. Its totient is φ = 119976480.

The previous prime is 120745687. The next prime is 120745721. The reversal of 120745717 is 717547021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19018321 + 101727396 = 4361^2 + 10086^2 .

It is a cyclic number.

It is not a de Polignac number, because 120745717 - 2¹⁹ = 120221429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120745727) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 384384 + ... + 384697.

It is an arithmetic number, because the mean of its divisors is an integer number (30378739).

Almost surely, 2^120745717 is an apocalyptic number.

It is an amenable number.

120745717 is a deficient number, since it is larger than the sum of its proper divisors (769239).

120745717 is an equidigital number, since it uses as much as digits as its factorization.

120745717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769238.

The product of its (nonzero) digits is 13720, while the sum is 34.

The square root of 120745717 is about 10988.4356029418. The cubic root of 120745717 is about 494.2620258644.

The spelling of 120745717 in words is "one hundred twenty million, seven hundred forty-five thousand, seven hundred seventeen".