432921 has 4 divisors (see below), whose sum is σ = 577232. Its totient is φ = 288612.

The previous prime is 432907. The next prime is 432923. The reversal of 432921 is 129234.

432921 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 432921 - 2⁶ = 432857 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

432921 is strictly pandigital in base 7.

It is not an unprimeable number, because it can be changed into a prime (432923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72151 + ... + 72156.

It is an arithmetic number, because the mean of its divisors is an integer number (144308).

2⁴³²⁹²¹ is an apocalyptic number.

It is an amenable number.

432921 is a deficient number, since it is larger than the sum of its proper divisors (144311).

432921 is a wasteful number, since it uses less digits than its factorization.

432921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144310.

The product of its digits is 432, while the sum is 21.

The square root of 432921 is about 657.9673244166. The cubic root of 432921 is about 75.6489464953.

It can be divided in two parts, 4329 and 21, that multiplied together give a palindrome (90909).

The spelling of 432921 in words is "four hundred thirty-two thousand, nine hundred twenty-one".