420442001 has 12 divisors (see below), whose sum is σ = 510351552. Its totient is φ = 344709288.

The previous prime is 420441991. The next prime is 420442007. The reversal of 420442001 is 100244024.

It is a de Polignac number, because none of the positive numbers 2^k-420442001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420442007) 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, 185405 + ... + 187658.

It is an arithmetic number, because the mean of its divisors is an integer number (42529296).

Almost surely, 2^420442001 is an apocalyptic number.

It is an amenable number.

420442001 is a deficient number, since it is larger than the sum of its proper divisors (89909551).

420442001 is a wasteful number, since it uses less digits than its factorization.

420442001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373100 (or 373093 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 420442001 is about 20504.6824164628. The cubic root of 420442001 is about 749.1498521029.

Adding to 420442001 its reverse (100244024), we get a palindrome (520686025).

The spelling of 420442001 in words is "four hundred twenty million, four hundred forty-two thousand, one".