421392 has 20 divisors (see below), whose sum is σ = 1088720. Its totient is φ = 140448.

The previous prime is 421381. The next prime is 421397. The reversal of 421392 is 293124.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 421392.

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

421392 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, 4342 + ... + 4437.

It is an arithmetic number, because the mean of its divisors is an integer number (54436).

2⁴²¹³⁹² is an apocalyptic number.

It is an amenable number.

421392 is an abundant number, since it is smaller than the sum of its proper divisors (667328).

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

421392 is a wasteful number, since it uses less digits than its factorization.

421392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8790 (or 8784 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 421392 is about 649.1471327827. The cubic root of 421392 is about 74.9713668477.

The spelling of 421392 in words is "four hundred twenty-one thousand, three hundred ninety-two".