420400401 has 8 divisors (see below), whose sum is σ = 575683584. Its totient is φ = 272692080.

The previous prime is 420400397. The next prime is 420400427. The reversal of 420400401 is 104004024.

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

It is not a de Polignac number, because 420400401 - 2² = 420400397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420400451) 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 7 ways as a sum of consecutive naturals, for example, 1893585 + ... + 1893806.

It is an arithmetic number, because the mean of its divisors is an integer number (71960448).

Almost surely, 2^420400401 is an apocalyptic number.

It is an amenable number.

420400401 is a deficient number, since it is larger than the sum of its proper divisors (155283183).

420400401 is a wasteful number, since it uses less digits than its factorization.

420400401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787431.

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

The square root of 420400401 is about 20503.6679889233. The cubic root of 420400401 is about 749.1251434537.

Adding to 420400401 its reverse (104004024), we get a palindrome (524404425).

The spelling of 420400401 in words is "four hundred twenty million, four hundred thousand, four hundred one".