421543201 has 8 divisors (see below), whose sum is σ = 425385000. Its totient is φ = 417715200.

The previous prime is 421543193. The next prime is 421543207. The reversal of 421543201 is 102345124.

It can be written as a sum of positive squares in 4 ways, for example, as 34398225 + 387144976 = 5865^2 + 19676^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 421543201 - 2³ = 421543193 is a prime.

It is a super-3 number, since 3×421543201³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421543207) 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 7 ways as a sum of consecutive naturals, for example, 63751 + ... + 70051.

It is an arithmetic number, because the mean of its divisors is an integer number (53173125).

Almost surely, 2^421543201 is an apocalyptic number.

It is an amenable number.

421543201 is a deficient number, since it is larger than the sum of its proper divisors (3841799).

421543201 is a wasteful number, since it uses less digits than its factorization.

421543201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6899.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 421543201 is about 20531.5172600565. The cubic root of 421543201 is about 749.8033268011.

Adding to 421543201 its reverse (102345124), we get a palindrome (523888325).

The spelling of 421543201 in words is "four hundred twenty-one million, five hundred forty-three thousand, two hundred one".