421321330 has 16 divisors (see below), whose sum is σ = 776876184. Its totient is φ = 164417920.

The previous prime is 421321253. The next prime is 421321391. The reversal of 421321330 is 33123124.

It can be written as a sum of positive squares in 4 ways, for example, as 360278361 + 61042969 = 18981^2 + 7813^2 .

It is a super-2 number, since 2×421321330² = 355023326225937800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421321298 and 421321307.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513397 + ... + 514216.

Almost surely, 2^421321330 is an apocalyptic number.

421321330 is a deficient number, since it is larger than the sum of its proper divisors (355554854).

421321330 is a wasteful number, since it uses less digits than its factorization.

421321330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027661.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 421321330 is about 20526.1133680977. The cubic root of 421321330 is about 749.6717556211.

Adding to 421321330 its reverse (33123124), we get a palindrome (454444454).

The spelling of 421321330 in words is "four hundred twenty-one million, three hundred twenty-one thousand, three hundred thirty".