12403120 has 40 divisors (see below), whose sum is σ = 29020464. Its totient is φ = 4929792.

The previous prime is 12403087. The next prime is 12403121. The reversal of 12403120 is 2130421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 12403120.

It is not an unprimeable number, because it can be changed into a prime (12403121) by changing a digit.

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, 15367 + ... + 16153.

Almost surely, 2^12403120 is an apocalyptic number.

12403120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12403120 is an abundant number, since it is smaller than the sum of its proper divisors (16617344).

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

12403120 is a wasteful number, since it uses less digits than its factorization.

12403120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12403120 is about 3521.8063546992. The cubic root of 12403120 is about 231.4783165070.

Adding to 12403120 its reverse (2130421), we get a palindrome (14533541).

The spelling of 12403120 in words is "twelve million, four hundred three thousand, one hundred twenty".