421330001 has 8 divisors (see below), whose sum is σ = 425407080. Its totient is φ = 417272832.

The previous prime is 421329991. The next prime is 421330069. The reversal of 421330001 is 100033124.

It can be written as a sum of positive squares in 4 ways, for example, as 45900625 + 375429376 = 6775^2 + 19376^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421330001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421330081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39431 + ... + 48963.

It is an arithmetic number, because the mean of its divisors is an integer number (53175885).

Almost surely, 2^421330001 is an apocalyptic number.

It is an amenable number.

421330001 is a deficient number, since it is larger than the sum of its proper divisors (4077079).

421330001 is a wasteful number, since it uses less digits than its factorization.

421330001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9955.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 421330001 is about 20526.3245857606. The cubic root of 421330001 is about 749.6768984568.

Adding to 421330001 its reverse (100033124), we get a palindrome (521363125).

The spelling of 421330001 in words is "four hundred twenty-one million, three hundred thirty thousand, one".