418021 has 4 divisors (see below), whose sum is σ = 421344. Its totient is φ = 414700.

The previous prime is 418009. The next prime is 418027. The reversal of 418021 is 120814.

It is a happy number.

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 418021 - 2⁹ = 417509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 417986 and 418004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418027) 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, 1465 + ... + 1726.

It is an arithmetic number, because the mean of its divisors is an integer number (105336).

2⁴¹⁸⁰²¹ is an apocalyptic number.

It is an amenable number.

418021 is a deficient number, since it is larger than the sum of its proper divisors (3323).

418021 is a wasteful number, since it uses less digits than its factorization.

418021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 418021 is about 646.5454353717. The cubic root of 418021 is about 74.7709157996.

Adding to 418021 its reverse (120814), we get a palindrome (538835).

The spelling of 418021 in words is "four hundred eighteen thousand, twenty-one".