421243330 has 8 divisors (see below), whose sum is σ = 758238012. Its totient is φ = 168497328.

The previous prime is 421243309. The next prime is 421243331. The reversal of 421243330 is 33342124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 419143729 + 2099601 = 20473^2 + 1449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (421243331) 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, 21062157 + ... + 21062176.

Almost surely, 2^421243330 is an apocalyptic number.

421243330 is a deficient number, since it is larger than the sum of its proper divisors (336994682).

421243330 is a wasteful number, since it uses less digits than its factorization.

421243330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42124340.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 421243330 is about 20524.2132614139. The cubic root of 421243330 is about 749.6254900579.

Adding to 421243330 its reverse (33342124), we get a palindrome (454585454).

It can be divided in two parts, 42124 and 3330, that added together give a palindrome (45454).

The spelling of 421243330 in words is "four hundred twenty-one million, two hundred forty-three thousand, three hundred thirty".