421995 has 16 divisors (see below), whose sum is σ = 771840. Its totient is φ = 192864.

The previous prime is 421987. The next prime is 421997. The reversal of 421995 is 599124.

It is a happy number.

It is not a de Polignac number, because 421995 - 2³ = 421987 is a prime.

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 421995.

It is not an unprimeable number, because it can be changed into a prime (421997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1905 + ... + 2114.

It is an arithmetic number, because the mean of its divisors is an integer number (48240).

2⁴²¹⁹⁹⁵ is an apocalyptic number.

421995 is a deficient number, since it is larger than the sum of its proper divisors (349845).

421995 is a wasteful number, since it uses less digits than its factorization.

421995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034.

The product of its digits is 3240, while the sum is 30.

The square root of 421995 is about 649.6114223134. The cubic root of 421995 is about 75.0071104370.

The spelling of 421995 in words is "four hundred twenty-one thousand, nine hundred ninety-five".