421798 has 8 divisors (see below), whose sum is σ = 681408. Its totient is φ = 194664.

The previous prime is 421783. The next prime is 421801. The reversal of 421798 is 897124.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8086 + ... + 8137.

It is an arithmetic number, because the mean of its divisors is an integer number (85176).

2⁴²¹⁷⁹⁸ is an apocalyptic number.

421798 is a deficient number, since it is larger than the sum of its proper divisors (259610).

421798 is a wasteful number, since it uses less digits than its factorization.

421798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16238.

The product of its digits is 4032, while the sum is 31.

The square root of 421798 is about 649.4597755058. The cubic root of 421798 is about 74.9954367594.

The spelling of 421798 in words is "four hundred twenty-one thousand, seven hundred ninety-eight".