420220401 has 16 divisors (see below), whose sum is σ = 563891328. Its totient is φ = 278355200.

The previous prime is 420220369. The next prime is 420220429. The reversal of 420220401 is 104022024.

It is a cyclic number.

It is not a de Polignac number, because 420220401 - 2⁵ = 420220369 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420220441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429625 + ... + 430601.

It is an arithmetic number, because the mean of its divisors is an integer number (35243208).

Almost surely, 2^420220401 is an apocalyptic number.

It is an amenable number.

420220401 is a deficient number, since it is larger than the sum of its proper divisors (143670927).

420220401 is a wasteful number, since it uses less digits than its factorization.

420220401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 420220401 is about 20499.2780604586. The cubic root of 420220401 is about 749.0182122401.

Adding to 420220401 its reverse (104022024), we get a palindrome (524242425).

The spelling of 420220401 in words is "four hundred twenty million, two hundred twenty thousand, four hundred one".