120531665 has 8 divisors (see below), whose sum is σ = 144775080. Its totient is φ = 96333952.

The previous prime is 120531647. The next prime is 120531731. The reversal of 120531665 is 566135021.

It can be written as a sum of positive squares in 4 ways, for example, as 9186961 + 111344704 = 3031^2 + 10552^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120531665 - 2²⁶ = 53422801 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5324 + ... + 16413.

It is an arithmetic number, because the mean of its divisors is an integer number (18096885).

Almost surely, 2^120531665 is an apocalyptic number.

It is an amenable number.

120531665 is a deficient number, since it is larger than the sum of its proper divisors (24243415).

120531665 is a wasteful number, since it uses less digits than its factorization.

120531665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22851.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 120531665 is about 10978.6914065384. The cubic root of 120531665 is about 493.9697853965.

Adding to 120531665 its reverse (566135021), we get a palindrome (686666686).

The spelling of 120531665 in words is "one hundred twenty million, five hundred thirty-one thousand, six hundred sixty-five".