432144421 has 4 divisors (see below), whose sum is σ = 432351052. Its totient is φ = 431937792.

The previous prime is 432144373. The next prime is 432144463. The reversal of 432144421 is 124441234.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171321921 + 260822500 = 13089^2 + 16150^2 .

It is a cyclic number.

It is not a de Polignac number, because 432144421 - 2¹⁵ = 432111653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (432144481) 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, 100146 + ... + 104371.

It is an arithmetic number, because the mean of its divisors is an integer number (108087763).

Almost surely, 2^432144421 is an apocalyptic number.

It is an amenable number.

432144421 is a deficient number, since it is larger than the sum of its proper divisors (206631).

432144421 is a wasteful number, since it uses less digits than its factorization.

432144421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206630.

The product of its digits is 3072, while the sum is 25.

The square root of 432144421 is about 20788.0836298106. The cubic root of 432144421 is about 756.0368608559.

Adding to 432144421 its reverse (124441234), we get a palindrome (556585655).

The spelling of 432144421 in words is "four hundred thirty-two million, one hundred forty-four thousand, four hundred twenty-one".