421004203 has 2 divisors, whose sum is σ = 421004204. Its totient is φ = 421004202.

The previous prime is 421004183. The next prime is 421004209. The reversal of 421004203 is 302400124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421004203 - 2¹³ = 420996011 is a prime.

It is not a weakly prime, because it can be changed into another prime (421004209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210502101 + 210502102.

It is an arithmetic number, because the mean of its divisors is an integer number (210502102).

Almost surely, 2^421004203 is an apocalyptic number.

421004203 is a deficient number, since it is larger than the sum of its proper divisors (1).

421004203 is an equidigital number, since it uses as much as digits as its factorization.

421004203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 421004203 is about 20518.3869492706. The cubic root of 421004203 is about 749.4836166941.

Adding to 421004203 its reverse (302400124), we get a palindrome (723404327).

The spelling of 421004203 in words is "four hundred twenty-one million, four thousand, two hundred three".