420501 has 4 divisors (see below), whose sum is σ = 560672. Its totient is φ = 280332.

The previous prime is 420499. The next prime is 420503. The reversal of 420501 is 105024.

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 an interprime number because it is at equal distance from previous prime (420499) and next prime (420503).

It is not a de Polignac number, because 420501 - 2¹ = 420499 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420503) 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, 70081 + ... + 70086.

It is an arithmetic number, because the mean of its divisors is an integer number (140168).

2⁴²⁰⁵⁰¹ is an apocalyptic number.

It is an amenable number.

420501 is a deficient number, since it is larger than the sum of its proper divisors (140171).

420501 is a wasteful number, since it uses less digits than its factorization.

420501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140170.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 420501 is about 648.4604845324. The cubic root of 420501 is about 74.9184892231.

Adding to 420501 its reverse (105024), we get a palindrome (525525).

The spelling of 420501 in words is "four hundred twenty thousand, five hundred one".