420400003 has 12 divisors (see below), whose sum is σ = 441050680. Its totient is φ = 400679136.

The previous prime is 420399997. The next prime is 420400067. The reversal of 420400003 is 300004024.

It is not a de Polignac number, because 420400003 - 2⁵ = 420399971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420400093) 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, 164308 + ... + 166846.

Almost surely, 2^420400003 is an apocalyptic number.

420400003 is a deficient number, since it is larger than the sum of its proper divisors (20650677).

420400003 is a wasteful number, since it uses less digits than its factorization.

420400003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2875 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 420400003 is about 20503.6582833406. The cubic root of 420400003 is about 749.1249070506.

Adding to 420400003 its reverse (300004024), we get a palindrome (720404027).

The spelling of 420400003 in words is "four hundred twenty million, four hundred thousand, three".