432521 has 4 divisors (see below), whose sum is σ = 433872. Its totient is φ = 431172.

The previous prime is 432511. The next prime is 432527. The reversal of 432521 is 125234.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 125234 = 2 ⋅62617.

It is a cyclic number.

It is not a de Polignac number, because 432521 - 2⁶ = 432457 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 432521.

It is not an unprimeable number, because it can be changed into a prime (432527) 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, 110 + ... + 936.

It is an arithmetic number, because the mean of its divisors is an integer number (108468).

2⁴³²⁵²¹ is an apocalyptic number.

It is an amenable number.

432521 is a deficient number, since it is larger than the sum of its proper divisors (1351).

432521 is an equidigital number, since it uses as much as digits as its factorization.

432521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350.

The product of its digits is 240, while the sum is 17.

The square root of 432521 is about 657.6632877088. The cubic root of 432521 is about 75.6256405474.

Adding to 432521 its reverse (125234), we get a palindrome (557755).

The spelling of 432521 in words is "four hundred thirty-two thousand, five hundred twenty-one".