421393 has 8 divisors (see below), whose sum is σ = 494912. Its totient is φ = 351216.

The previous prime is 421381. The next prime is 421397. The reversal of 421393 is 393124.

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

It is a cyclic number.

It is not a de Polignac number, because 421393 - 2⁵ = 421361 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 555 + ... + 1072.

It is an arithmetic number, because the mean of its divisors is an integer number (61864).

2⁴²¹³⁹³ is an apocalyptic number.

It is an amenable number.

421393 is a deficient number, since it is larger than the sum of its proper divisors (73519).

421393 is a wasteful number, since it uses less digits than its factorization.

421393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671.

The product of its digits is 648, while the sum is 22.

The square root of 421393 is about 649.1479030236. The cubic root of 421393 is about 74.9714261522.

The spelling of 421393 in words is "four hundred twenty-one thousand, three hundred ninety-three".