420243005 has 48 divisors (see below), whose sum is σ = 651421440. Its totient is φ = 254352384.

The previous prime is 420242993. The next prime is 420243049. The reversal of 420243005 is 500342024.

It is not a de Polignac number, because 420243005 - 2⁸ = 420242749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134501 + ... + 137589.

It is an arithmetic number, because the mean of its divisors is an integer number (13571280).

Almost surely, 2^420243005 is an apocalyptic number.

It is an amenable number.

420243005 is a deficient number, since it is larger than the sum of its proper divisors (231178435).

420243005 is a wasteful number, since it uses less digits than its factorization.

420243005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 420243005 is about 20499.8293895340. The cubic root of 420243005 is about 749.0316421006.

Adding to 420243005 its reverse (500342024), we get a palindrome (920585029).

The spelling of 420243005 in words is "four hundred twenty million, two hundred forty-three thousand, five".