421895 has 8 divisors (see below), whose sum is σ = 533040. Its totient is φ = 319680.

The previous prime is 421891. The next prime is 421907. The reversal of 421895 is 598124.

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

It is not a de Polignac number, because 421895 - 2² = 421891 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421891) 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, 2126 + ... + 2315.

It is an arithmetic number, because the mean of its divisors is an integer number (66630).

2⁴²¹⁸⁹⁵ is an apocalyptic number.

421895 is a deficient number, since it is larger than the sum of its proper divisors (111145).

421895 is a wasteful number, since it uses less digits than its factorization.

421895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4465.

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

The square root of 421895 is about 649.5344486630. The cubic root of 421895 is about 75.0011851665.

The spelling of 421895 in words is "four hundred twenty-one thousand, eight hundred ninety-five".