421032321 has 12 divisors (see below), whose sum is σ = 622991460. Its totient is φ = 273841920.

The previous prime is 421032299. The next prime is 421032341. The reversal of 421032321 is 123230124.

It can be written as a sum of positive squares in 2 ways, for example, as 42185025 + 378847296 = 6495^2 + 19464^2 .

It is not a de Polignac number, because 421032321 - 2⁵ = 421032289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421032294 and 421032303.

It is not an unprimeable number, because it can be changed into a prime (421032341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 570136 + ... + 570873.

It is an arithmetic number, because the mean of its divisors is an integer number (51915955).

Almost surely, 2^421032321 is an apocalyptic number.

421032321 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

421032321 is a deficient number, since it is larger than the sum of its proper divisors (201959139).

421032321 is a wasteful number, since it uses less digits than its factorization.

421032321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141056 (or 1141053 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 421032321 is about 20519.0721281446. The cubic root of 421032321 is about 749.5003018096.

Adding to 421032321 its reverse (123230124), we get a palindrome (544262445).

The spelling of 421032321 in words is "four hundred twenty-one million, thirty-two thousand, three hundred twenty-one".