12621824 has 24 divisors (see below), whose sum is σ = 25241580. Its totient is φ = 6309888.

The previous prime is 12621823. The next prime is 12621877. The reversal of 12621824 is 42812621.

It is a happy number.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 12621793 and 12621802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1034 + ... + 5129.

Almost surely, 2^12621824 is an apocalyptic number.

It is an amenable number.

12621824 is a deficient number, since it is larger than the sum of its proper divisors (12619756).

12621824 is an frugal number, since it uses more digits than its factorization.

12621824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185 (or 6165 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 12621824 is about 3552.7206476164. The cubic root of 12621824 is about 232.8309481260.

The spelling of 12621824 in words is "twelve million, six hundred twenty-one thousand, eight hundred twenty-four".