12424240 has 20 divisors (see below), whose sum is σ = 28886544. Its totient is φ = 4969664.

The previous prime is 12424231. The next prime is 12424241. The reversal of 12424240 is 4242421.

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

It is not an unprimeable number, because it can be changed into a prime (12424241) 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, 77572 + ... + 77731.

Almost surely, 2^12424240 is an apocalyptic number.

12424240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12424240 is an abundant number, since it is smaller than the sum of its proper divisors (16462304).

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

12424240 is a wasteful number, since it uses less digits than its factorization.

12424240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155316 (or 155310 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 12424240 is about 3524.8035406246. The cubic root of 12424240 is about 231.6096288912.

Adding to 12424240 its reverse (4242421), we get a palindrome (16666661).

The spelling of 12424240 in words is "twelve million, four hundred twenty-four thousand, two hundred forty".