12021424 has 40 divisors (see below), whose sum is σ = 24208272. Its totient is φ = 5779200.

The previous prime is 12021403. The next prime is 12021473. The reversal of 12021424 is 42412021.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 12021398 and 12021407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69402 + ... + 69574.

Almost surely, 2^12021424 is an apocalyptic number.

It is an amenable number.

12021424 is an abundant number, since it is smaller than the sum of its proper divisors (12186848).

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

12021424 is a wasteful number, since it uses less digits than its factorization.

12021424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 12021424 is about 3467.1925242190. The cubic root of 12021424 is about 229.0790139422.

Adding to 12021424 its reverse (42412021), we get a palindrome (54433445).

The spelling of 12021424 in words is "twelve million, twenty-one thousand, four hundred twenty-four".