421398 has 24 divisors (see below), whose sum is σ = 936936. Its totient is φ = 136800.

The previous prime is 421397. The next prime is 421409. The reversal of 421398 is 893124.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 421398.

It is not an unprimeable number, because it can be changed into a prime (421397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 453 + ... + 1023.

It is an arithmetic number, because the mean of its divisors is an integer number (39039).

2⁴²¹³⁹⁸ is an apocalyptic number.

421398 is an abundant number, since it is smaller than the sum of its proper divisors (515538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421398 is a wasteful number, since it uses less digits than its factorization.

421398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 617 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 421398 is about 649.1517542147. The cubic root of 421398 is about 74.9717226732.

The spelling of 421398 in words is "four hundred twenty-one thousand, three hundred ninety-eight".