432135021 has 8 divisors (see below), whose sum is σ = 576391680. Its totient is φ = 287984192.

The previous prime is 432135013. The next prime is 432135049. The reversal of 432135021 is 120531234.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 432135021 - 2³ = 432135013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (432135001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16380 + ... + 33653.

It is an arithmetic number, because the mean of its divisors is an integer number (72048960).

Almost surely, 2^432135021 is an apocalyptic number.

It is an amenable number.

432135021 is a deficient number, since it is larger than the sum of its proper divisors (144256659).

432135021 is a wasteful number, since it uses less digits than its factorization.

432135021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52915.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 432135021 is about 20787.8575375145. The cubic root of 432135021 is about 756.0313790480.

Adding to 432135021 its reverse (120531234), we get a palindrome (552666255).

The spelling of 432135021 in words is "four hundred thirty-two million, one hundred thirty-five thousand, twenty-one".