420401 has 4 divisors (see below), whose sum is σ = 422400. Its totient is φ = 418404.

The previous prime is 420397. The next prime is 420419. The reversal of 420401 is 104024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420401 - 2² = 420397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641 + ... + 1118.

It is an arithmetic number, because the mean of its divisors is an integer number (105600).

2⁴²⁰⁴⁰¹ is an apocalyptic number.

It is an amenable number.

420401 is a deficient number, since it is larger than the sum of its proper divisors (1999).

420401 is a wasteful number, since it uses less digits than its factorization.

420401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 420401 is about 648.3833742471. The cubic root of 420401 is about 74.9125499246.

Adding to 420401 its reverse (104024), we get a palindrome (524425).

The spelling of 420401 in words is "four hundred twenty thousand, four hundred one", and thus it is an iban number.