12120424 has 8 divisors (see below), whose sum is σ = 22725810. Its totient is φ = 6060208.

The previous prime is 12120419. The next prime is 12120431. The reversal of 12120424 is 42402121.

12120424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12040900 + 79524 = 3470^2 + 282^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 12120398 and 12120407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757519 + ... + 757534.

Almost surely, 2^12120424 is an apocalyptic number.

It is an amenable number.

12120424 is a deficient number, since it is larger than the sum of its proper divisors (10605386).

12120424 is a wasteful number, since it uses less digits than its factorization.

12120424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515059 (or 1515055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 12120424 is about 3481.4399319822. The cubic root of 12120424 is about 229.7061401473.

Adding to 12120424 its reverse (42402121), we get a palindrome (54522545).

It can be divided in two parts, 12120 and 424, that added together give a square (12544 = 112²).

The spelling of 12120424 in words is "twelve million, one hundred twenty thousand, four hundred twenty-four".