12432021 has 16 divisors (see below), whose sum is σ = 19084800. Its totient is φ = 7051248.

The previous prime is 12432011. The next prime is 12432053. The reversal of 12432021 is 12023421.

It is not a de Polignac number, because 12432021 - 2⁶ = 12431957 is a prime.

It is a super-2 number, since 2×12432021² = 309110292288882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12432011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 790 + ... + 5048.

It is an arithmetic number, because the mean of its divisors is an integer number (1192800).

Almost surely, 2^12432021 is an apocalyptic number.

It is an amenable number.

12432021 is a deficient number, since it is larger than the sum of its proper divisors (6652779).

12432021 is a wasteful number, since it uses less digits than its factorization.

12432021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4408.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12432021 is about 3525.9071173246. The cubic root of 12432021 is about 231.6579692978.

Adding to 12432021 its reverse (12023421), we get a palindrome (24455442).

The spelling of 12432021 in words is "twelve million, four hundred thirty-two thousand, twenty-one".