606421 has 4 divisors (see below), whose sum is σ = 608652. Its totient is φ = 604192.

The previous prime is 606413. The next prime is 606433. The reversal of 606421 is 124606.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124606 = 2 ⋅62303.

It can be written as a sum of positive squares in 2 ways, for example, as 264196 + 342225 = 514^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 606421 - 2³ = 606413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640 + ... + 1273.

It is an arithmetic number, because the mean of its divisors is an integer number (152163).

2⁶⁰⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

606421 is a deficient number, since it is larger than the sum of its proper divisors (2231).

606421 is a wasteful number, since it uses less digits than its factorization.

606421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 606421 is about 778.7303769598. The cubic root of 606421 is about 84.6430707663.

The spelling of 606421 in words is "six hundred six thousand, four hundred twenty-one".