420240401 has 8 divisors (see below), whose sum is σ = 480948480. Its totient is φ = 359700768.

The previous prime is 420240377. The next prime is 420240427. The reversal of 420240401 is 104042024.

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

It is a de Polignac number, because none of the positive numbers 2^k-420240401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420240401.

It is not an unprimeable number, because it can be changed into a prime (420240451) 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, 36716 + ... + 46781.

It is an arithmetic number, because the mean of its divisors is an integer number (60118560).

Almost surely, 2^420240401 is an apocalyptic number.

It is an amenable number.

420240401 is a deficient number, since it is larger than the sum of its proper divisors (60708079).

420240401 is an equidigital number, since it uses as much as digits as its factorization.

420240401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84223.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 420240401 is about 20499.7658767119. The cubic root of 420240401 is about 749.0300949938.

Adding to 420240401 its reverse (104042024), we get a palindrome (524282425).

The spelling of 420240401 in words is "four hundred twenty million, two hundred forty thousand, four hundred one".