421442 has 8 divisors (see below), whose sum is σ = 722496. Its totient is φ = 180612.

The previous prime is 421433. The next prime is 421453. The reversal of 421442 is 244124.

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

It is a super-2 number, since 2×421442² = 355226718728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421442.

It is an unprimeable number.

421442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15038 + ... + 15065.

It is an arithmetic number, because the mean of its divisors is an integer number (90312).

2⁴²¹⁴⁴² is an apocalyptic number.

421442 is a deficient number, since it is larger than the sum of its proper divisors (301054).

421442 is a wasteful number, since it uses less digits than its factorization.

421442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30112.

The product of its digits is 256, while the sum is 17.

The square root of 421442 is about 649.1856437106. The cubic root of 421442 is about 74.9743319571.

Adding to 421442 its reverse (244124), we get a palindrome (665566).

The spelling of 421442 in words is "four hundred twenty-one thousand, four hundred forty-two", and thus it is an iban number.