421334003 has 2 divisors, whose sum is σ = 421334004. Its totient is φ = 421334002.

The previous prime is 421333981. The next prime is 421334009. The reversal of 421334003 is 300433124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421334003 - 2¹⁰ = 421332979 is a prime.

It is not a weakly prime, because it can be changed into another prime (421334009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210667001 + 210667002.

It is an arithmetic number, because the mean of its divisors is an integer number (210667002).

Almost surely, 2^421334003 is an apocalyptic number.

421334003 is a deficient number, since it is larger than the sum of its proper divisors (1).

421334003 is an equidigital number, since it uses as much as digits as its factorization.

421334003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 421334003 is about 20526.4220701027. The cubic root of 421334003 is about 749.6792720495.

Adding to 421334003 its reverse (300433124), we get a palindrome (721767127).

The spelling of 421334003 in words is "four hundred twenty-one million, three hundred thirty-four thousand, three".