120642665 has 16 divisors (see below), whose sum is σ = 170081856. Its totient is φ = 80990400.

The previous prime is 120642619. The next prime is 120642673. The reversal of 120642665 is 566246021.

It is not a de Polignac number, because 120642665 - 2¹² = 120638569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83651 + ... + 85080.

It is an arithmetic number, because the mean of its divisors is an integer number (10630116).

Almost surely, 2^120642665 is an apocalyptic number.

It is an amenable number.

120642665 is a deficient number, since it is larger than the sum of its proper divisors (49439191).

120642665 is a wasteful number, since it uses less digits than its factorization.

120642665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168760.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 120642665 is about 10983.7454904964. The cubic root of 120642665 is about 494.1213743953.

Adding to 120642665 its reverse (566246021), we get a palindrome (686888686).

The spelling of 120642665 in words is "one hundred twenty million, six hundred forty-two thousand, six hundred sixty-five".