420646205 has 16 divisors (see below), whose sum is σ = 577321344. Its totient is φ = 288225600.

The previous prime is 420646199. The next prime is 420646217. The reversal of 420646205 is 502646024.

It is not a de Polignac number, because 420646205 - 2⁶ = 420646141 is a prime.

It is a super-3 number, since 3×420646205³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52730 + ... + 60180.

It is an arithmetic number, because the mean of its divisors is an integer number (36082584).

Almost surely, 2^420646205 is an apocalyptic number.

It is an amenable number.

420646205 is a deficient number, since it is larger than the sum of its proper divisors (156675139).

420646205 is a wasteful number, since it uses less digits than its factorization.

420646205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9076.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 420646205 is about 20509.6612600013. The cubic root of 420646205 is about 749.2711170542.

The spelling of 420646205 in words is "four hundred twenty million, six hundred forty-six thousand, two hundred five".