421200001 has 4 divisors (see below), whose sum is σ = 421472772. Its totient is φ = 420927232.

The previous prime is 421199993. The next prime is 421200047. The reversal of 421200001 is 100002124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21160000 + 400040001 = 4600^2 + 20001^2 .

It is a cyclic number.

It is not a de Polignac number, because 421200001 - 2³ = 421199993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421200301) 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, 134056 + ... + 137161.

It is an arithmetic number, because the mean of its divisors is an integer number (105368193).

Almost surely, 2^421200001 is an apocalyptic number.

It is an amenable number.

421200001 is a deficient number, since it is larger than the sum of its proper divisors (272771).

421200001 is a wasteful number, since it uses less digits than its factorization.

421200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272770.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 421200001 is about 20523.1576761472. The cubic root of 421200001 is about 749.5997870701.

Adding to 421200001 its reverse (100002124), we get a palindrome (521202125).

The spelling of 421200001 in words is "four hundred twenty-one million, two hundred thousand, one".