420244245 has 24 divisors (see below), whose sum is σ = 729173016. Its totient is φ = 223899648.

The previous prime is 420244241. The next prime is 420244271. The reversal of 420244245 is 542442024.

It can be written as a sum of positive squares in 4 ways, for example, as 106316721 + 313927524 = 10311^2 + 17718^2 .

It is not a de Polignac number, because 420244245 - 2² = 420244241 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420244241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45109 + ... + 53621.

It is an arithmetic number, because the mean of its divisors is an integer number (30382209).

Almost surely, 2^420244245 is an apocalyptic number.

420244245 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

420244245 is a deficient number, since it is larger than the sum of its proper divisors (308928771).

420244245 is a wasteful number, since it uses less digits than its factorization.

420244245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9621 (or 9618 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 420244245 is about 20499.8596336658. The cubic root of 420244245 is about 749.0323788159.

Adding to 420244245 its reverse (542442024), we get a palindrome (962686269).

The spelling of 420244245 in words is "four hundred twenty million, two hundred forty-four thousand, two hundred forty-five".