1432432321 has 4 divisors (see below), whose sum is σ = 1432525444. Its totient is φ = 1432339200.

The previous prime is 1432432307. The next prime is 1432432333. The reversal of 1432432321 is 1232342341.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1232342341 = 127 ⋅9703483.

It can be written as a sum of positive squares in 2 ways, for example, as 228342321 + 1204090000 = 15111^2 + 34700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1432432321 - 2⁵ = 1432432289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1432432721) 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, 17400 + ... + 56281.

It is an arithmetic number, because the mean of its divisors is an integer number (358131361).

Almost surely, 2^1432432321 is an apocalyptic number.

It is an amenable number.

1432432321 is a deficient number, since it is larger than the sum of its proper divisors (93123).

1432432321 is an equidigital number, since it uses as much as digits as its factorization.

1432432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93122.

The product of its digits is 3456, while the sum is 25.

The square root of 1432432321 is about 37847.4876444923. The cubic root of 1432432321 is about 1127.2615762249.

Adding to 1432432321 its reverse (1232342341), we get a palindrome (2664774662).

The spelling of 1432432321 in words is "one billion, four hundred thirty-two million, four hundred thirty-two thousand, three hundred twenty-one".