420445245 has 64 divisors (see below), whose sum is σ = 766736640. Its totient is φ = 194918400.

The previous prime is 420445231. The next prime is 420445247. The reversal of 420445245 is 542544024.

It is not a de Polignac number, because 420445245 - 2⁹ = 420444733 is a prime.

It is a super-2 number, since 2×420445245² = 353548408086220050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420445247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 371841 + ... + 372969.

It is an arithmetic number, because the mean of its divisors is an integer number (11980260).

Almost surely, 2^420445245 is an apocalyptic number.

It is an amenable number.

420445245 is a deficient number, since it is larger than the sum of its proper divisors (346291395).

420445245 is a wasteful number, since it uses less digits than its factorization.

420445245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246.

The product of its (nonzero) digits is 25600, while the sum is 30.

The square root of 420445245 is about 20504.7615201933. The cubic root of 420445245 is about 749.1517788339.

Adding to 420445245 its reverse (542544024), we get a palindrome (962989269).

The spelling of 420445245 in words is "four hundred twenty million, four hundred forty-five thousand, two hundred forty-five".