420065 has 8 divisors (see below), whose sum is σ = 521640. Its totient is φ = 324352.

The previous prime is 420047. The next prime is 420073. The reversal of 420065 is 560024.

It can be written as a sum of positive squares in 4 ways, for example, as 5329 + 414736 = 73^2 + 644^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 420065 - 2⁶ = 420001 is a prime.

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, 1304 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (65205).

2⁴²⁰⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

420065 is a deficient number, since it is larger than the sum of its proper divisors (101575).

420065 is a wasteful number, since it uses less digits than its factorization.

420065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 420065 is about 648.1242164894. The cubic root of 420065 is about 74.8925869801.

Adding to 420065 its reverse (560024), we get a palindrome (980089).

The spelling of 420065 in words is "four hundred twenty thousand, sixty-five".