420606 has 16 divisors (see below), whose sum is σ = 934800. Its totient is φ = 140184.

The previous prime is 420599. The next prime is 420613. The reversal of 420606 is 606024.

It is an interprime number because it is at equal distance from previous prime (420599) and next prime (420613).

It is a Harshad number since it is a multiple of its sum of digits (18).

420606 is a modest number, since divided by 606 gives 42 as remainder.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3841 + ... + 3948.

It is an arithmetic number, because the mean of its divisors is an integer number (58425).

2⁴²⁰⁶⁰⁶ is an apocalyptic number.

420606 is an abundant number, since it is smaller than the sum of its proper divisors (514194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420606 is a wasteful number, since it uses less digits than its factorization.

420606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7800 (or 7794 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 420606 is about 648.5414404647. The cubic root of 420606 is about 74.9247244732.

The spelling of 420606 in words is "four hundred twenty thousand, six hundred six".