12120685 has 4 divisors (see below), whose sum is σ = 14544828. Its totient is φ = 9696544.

The previous prime is 12120683. The next prime is 12120709. The reversal of 12120685 is 58602121.

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 2566404 + 9554281 = 1602^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120685 - 2¹ = 12120683 is a prime.

It is a super-2 number, since 2×12120685² = 293822009738450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212064 + ... + 1212073.

It is an arithmetic number, because the mean of its divisors is an integer number (3636207).

Almost surely, 2^12120685 is an apocalyptic number.

It is an amenable number.

12120685 is a deficient number, since it is larger than the sum of its proper divisors (2424143).

12120685 is an equidigital number, since it uses as much as digits as its factorization.

12120685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424142.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 12120685 is about 3481.4774162703. The cubic root of 12120685 is about 229.7077889585.

The spelling of 12120685 in words is "twelve million, one hundred twenty thousand, six hundred eighty-five".