421242606401 has 4 divisors (see below), whose sum is σ = 421263582804. Its totient is φ = 421221630000.

The previous prime is 421242606397. The next prime is 421242606403. The reversal of 421242606401 is 104606242124.

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 241352108176 + 179890498225 = 491276^2 + 424135^2 .

It is a cyclic number.

It is not a de Polignac number, because 421242606401 - 2² = 421242606397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421242606403) 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 3 ways as a sum of consecutive naturals, for example, 10458050 + ... + 10498251.

It is an arithmetic number, because the mean of its divisors is an integer number (105315895701).

Almost surely, 2^421242606401 is an apocalyptic number.

It is an amenable number.

421242606401 is a deficient number, since it is larger than the sum of its proper divisors (20976403).

421242606401 is a wasteful number, since it uses less digits than its factorization.

421242606401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20976402.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 421242606401 its reverse (104606242124), we get a palindrome (525848848525).

The spelling of 421242606401 in words is "four hundred twenty-one billion, two hundred forty-two million, six hundred six thousand, four hundred one".