620205 has 16 divisors (see below), whose sum is σ = 1002240. Its totient is φ = 327488.

The previous prime is 620201. The next prime is 620227. The reversal of 620205 is 502026.

It is a cyclic number.

It is not a de Polignac number, because 620205 - 2² = 620201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a d-powerful number, because it can be written as 6⁷ + 2¹⁷ + 2¹⁷ + 0 + 0 + 5⁷ .

620205 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620205.

It is not an unprimeable number, because it can be changed into a prime (620201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2476 + ... + 2714.

It is an arithmetic number, because the mean of its divisors is an integer number (62640).

2⁶²⁰²⁰⁵ is an apocalyptic number.

It is an amenable number.

620205 is a deficient number, since it is larger than the sum of its proper divisors (382035).

620205 is a wasteful number, since it uses less digits than its factorization.

620205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 620205 is about 787.5309517727. The cubic root of 620205 is about 85.2795868558.

The spelling of 620205 in words is "six hundred twenty thousand, two hundred five".