432432421 has 2 divisors, whose sum is σ = 432432422. Its totient is φ = 432432420.

The previous prime is 432432401. The next prime is 432432437. The reversal of 432432421 is 124234234.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 349877025 + 82555396 = 18705^2 + 9086^2 .

It is a cyclic number.

It is not a de Polignac number, because 432432421 - 2¹¹ = 432430373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (432432401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216216210 + 216216211.

It is an arithmetic number, because the mean of its divisors is an integer number (216216211).

Almost surely, 2^432432421 is an apocalyptic number.

It is an amenable number.

432432421 is a deficient number, since it is larger than the sum of its proper divisors (1).

432432421 is an equidigital number, since it uses as much as digits as its factorization.

432432421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 25.

The square root of 432432421 is about 20795.0095215174. The cubic root of 432432421 is about 756.2047756031.

Adding to 432432421 its reverse (124234234), we get a palindrome (556666655).

The spelling of 432432421 in words is "four hundred thirty-two million, four hundred thirty-two thousand, four hundred twenty-one".