12103240 has 16 divisors (see below), whose sum is σ = 27232380. Its totient is φ = 4841280.

The previous prime is 12103213. The next prime is 12103243. The reversal of 12103240 is 4230121.

It can be written as a sum of positive squares in 2 ways, for example, as 11009124 + 1094116 = 3318^2 + 1046^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12103240.

It is not an unprimeable number, because it can be changed into a prime (12103243) 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 3 ways as a sum of consecutive naturals, for example, 151251 + ... + 151330.

Almost surely, 2^12103240 is an apocalyptic number.

12103240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12103240 is an abundant number, since it is smaller than the sum of its proper divisors (15129140).

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

12103240 is a wasteful number, since it uses less digits than its factorization.

12103240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302592 (or 302588 counting only the distinct ones).

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

The square root of 12103240 is about 3478.9711122687. The cubic root of 12103240 is about 229.5975318119.

Adding to 12103240 its reverse (4230121), we get a palindrome (16333361).

It can be divided in two parts, 1210 and 3240, that multiplied together give a square (3920400 = 1980²).

The spelling of 12103240 in words is "twelve million, one hundred three thousand, two hundred forty".