120636 has 24 divisors (see below), whose sum is σ = 313040. Its totient is φ = 40176.

The previous prime is 120623. The next prime is 120641. The reversal of 120636 is 636021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

120636 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451 + ... + 666.

2¹²⁰⁶³⁶ is an apocalyptic number.

It is an amenable number.

120636 is an abundant number, since it is smaller than the sum of its proper divisors (192404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120636 is a wasteful number, since it uses less digits than its factorization.

120636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130 (or 1122 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 120636 is about 347.3269353218. The cubic root of 120636 is about 49.4112274852.

Adding to 120636 its reverse (636021), we get a palindrome (756657).

The spelling of 120636 in words is "one hundred twenty thousand, six hundred thirty-six".