421040342401 has 6 divisors (see below), whose sum is σ = 489781622850. Its totient is φ = 360891722016.

The previous prime is 421040342383. The next prime is 421040342407. The reversal of 421040342401 is 104243040124.

It can be written as a sum of positive squares in only one way, i.e., 415999200400 + 5041142001 = 644980^2 + 71001^2 .

It is not a de Polignac number, because 421040342401 - 2⁹ = 421040341889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421040342407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4296329976 + ... + 4296330073.

It is an arithmetic number, because the mean of its divisors is an integer number (81630270475).

Almost surely, 2^421040342401 is an apocalyptic number.

It is an amenable number.

421040342401 is a deficient number, since it is larger than the sum of its proper divisors (68741280449).

421040342401 is an equidigital number, since it uses as much as digits as its factorization.

421040342401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8592660063 (or 8592660056 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 421040342401 its reverse (104243040124), we get a palindrome (525283382525).

The spelling of 421040342401 in words is "four hundred twenty-one billion, forty million, three hundred forty-two thousand, four hundred one".