421375 has 8 divisors (see below), whose sum is σ = 526032. Its totient is φ = 337000.

The previous prime is 421361. The next prime is 421381. The reversal of 421375 is 573124.

It is not a de Polignac number, because 421375 - 2¹³ = 413183 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8 and base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1561 + ... + 1810.

It is an arithmetic number, because the mean of its divisors is an integer number (65754).

2⁴²¹³⁷⁵ is an apocalyptic number.

421375 is a deficient number, since it is larger than the sum of its proper divisors (104657).

421375 is an equidigital number, since it uses as much as digits as its factorization.

421375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386 (or 3376 counting only the distinct ones).

The product of its digits is 840, while the sum is 22.

The square root of 421375 is about 649.1340385467. The cubic root of 421375 is about 74.9703586571.

Adding to 421375 its reverse (573124), we get a palindrome (994499).

The spelling of 421375 in words is "four hundred twenty-one thousand, three hundred seventy-five".