420547205 has 12 divisors (see below), whose sum is σ = 546463620. Its totient is φ = 310557312.

The previous prime is 420547201. The next prime is 420547223. The reversal of 420547205 is 502745024.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 223622116 + 196925089 = 14954^2 + 14033^2 .

It is not a de Polignac number, because 420547205 - 2² = 420547201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420547201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248000 + ... + 249689.

It is an arithmetic number, because the mean of its divisors is an integer number (45538635).

Almost surely, 2^420547205 is an apocalyptic number.

It is an amenable number.

420547205 is a deficient number, since it is larger than the sum of its proper divisors (125916415).

420547205 is a wasteful number, since it uses less digits than its factorization.

420547205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497720 (or 497707 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 420547205 is about 20507.2476212680. The cubic root of 420547205 is about 749.2123315794.

The spelling of 420547205 in words is "four hundred twenty million, five hundred forty-seven thousand, two hundred five".