421598 has 8 divisors (see below), whose sum is σ = 641520. Its totient is φ = 207760.

The previous prime is 421559. The next prime is 421607. The reversal of 421598 is 895124.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 421598.

It is a congruent number.

It is an unprimeable number.

421598 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343 + ... + 1626.

It is an arithmetic number, because the mean of its divisors is an integer number (80190).

2⁴²¹⁵⁹⁸ is an apocalyptic number.

421598 is a deficient number, since it is larger than the sum of its proper divisors (219922).

421598 is a wasteful number, since it uses less digits than its factorization.

421598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042.

The product of its digits is 2880, while the sum is 29.

The square root of 421598 is about 649.3057831253. The cubic root of 421598 is about 74.9835815913.

The spelling of 421598 in words is "four hundred twenty-one thousand, five hundred ninety-eight".