420625 has 10 divisors (see below), whose sum is σ = 526394. Its totient is φ = 336000.

The previous prime is 420613. The next prime is 420671. The reversal of 420625 is 526024.

It can be written as a sum of positive squares in 5 ways, for example, as 201601 + 219024 = 449^2 + 468^2 .

It is not a de Polignac number, because 420625 - 2⁵ = 420593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 289 + ... + 961.

2⁴²⁰⁶²⁵ is an apocalyptic number.

It is an amenable number.

420625 is a deficient number, since it is larger than the sum of its proper divisors (105769).

420625 is an frugal number, since it uses more digits than its factorization.

420625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 420625 is about 648.5560885536. The cubic root of 420625 is about 74.9258526457.

Adding to 420625 its reverse (526024), we get a palindrome (946649).

The spelling of 420625 in words is "four hundred twenty thousand, six hundred twenty-five".