421065 has 16 divisors (see below), whose sum is σ = 748800. Its totient is φ = 224496.

The previous prime is 421049. The next prime is 421079. The reversal of 421065 is 560124.

It is a happy number.

It is not a de Polignac number, because 421065 - 2⁴ = 421049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1425 + ... + 1694.

It is an arithmetic number, because the mean of its divisors is an integer number (46800).

2⁴²¹⁰⁶⁵ is an apocalyptic number.

421065 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421065 is a deficient number, since it is larger than the sum of its proper divisors (327735).

421065 is a wasteful number, since it uses less digits than its factorization.

421065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133 (or 3127 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 421065 is about 648.8952149616. The cubic root of 421065 is about 74.9519692472.

Adding to 421065 its reverse (560124), we get a palindrome (981189).

The spelling of 421065 in words is "four hundred twenty-one thousand, sixty-five".