12236240 has 20 divisors (see below), whose sum is σ = 28449444. Its totient is φ = 4894464.

The previous prime is 12236239. The next prime is 12236249. The reversal of 12236240 is 4263221.

It can be written as a sum of positive squares in 2 ways, for example, as 3139984 + 9096256 = 1772^2 + 3016^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12236249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76397 + ... + 76556.

Almost surely, 2^12236240 is an apocalyptic number.

12236240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12236240 is an abundant number, since it is smaller than the sum of its proper divisors (16213204).

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

12236240 is a wasteful number, since it uses less digits than its factorization.

12236240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152966 (or 152960 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 12236240 is about 3498.0337333994. The cubic root of 12236240 is about 230.4354698800.

Adding to 12236240 its reverse (4263221), we get a palindrome (16499461).

The spelling of 12236240 in words is "twelve million, two hundred thirty-six thousand, two hundred forty".