12103720 has 16 divisors (see below), whose sum is σ = 27233460. Its totient is φ = 4841472.

The previous prime is 12103709. The next prime is 12103747. The reversal of 12103720 is 2730121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11792356 + 311364 = 3434^2 + 558^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12103694 and 12103703.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151257 + ... + 151336.

Almost surely, 2^12103720 is an apocalyptic number.

12103720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12103720 is an abundant number, since it is smaller than the sum of its proper divisors (15129740).

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

12103720 is a wasteful number, since it uses less digits than its factorization.

12103720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302604 (or 302600 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 12103720 is about 3479.0400974982. The cubic root of 12103720 is about 229.6005669595.

Adding to 12103720 its reverse (2730121), we get a palindrome (14833841).

The spelling of 12103720 in words is "twelve million, one hundred three thousand, seven hundred twenty".