420739205 has 12 divisors (see below), whose sum is σ = 536335140. Its totient is φ = 316790784.

The previous prime is 420739199. The next prime is 420739217. The reversal of 420739205 is 502937024.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 9541921 + 411197284 = 3089^2 + 20278^2 .

It is not a de Polignac number, because 420739205 - 2⁶ = 420739141 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144140 + ... + 147029.

It is an arithmetic number, because the mean of its divisors is an integer number (44694595).

Almost surely, 2^420739205 is an apocalyptic number.

It is an amenable number.

420739205 is a deficient number, since it is larger than the sum of its proper divisors (115595935).

420739205 is a wasteful number, since it uses less digits than its factorization.

420739205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291208 (or 291191 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 420739205 is about 20511.9283588843. The cubic root of 420739205 is about 749.3263313716.

The spelling of 420739205 in words is "four hundred twenty million, seven hundred thirty-nine thousand, two hundred five".