421002303 has 16 divisors (see below), whose sum is σ = 567979776. Its totient is φ = 277358400.

The previous prime is 421002259. The next prime is 421002313. The reversal of 421002303 is 303200124.

It is not a de Polignac number, because 421002303 - 2⁸ = 421002047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421002313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184576 + ... + 186842.

It is an arithmetic number, because the mean of its divisors is an integer number (35498736).

Almost surely, 2^421002303 is an apocalyptic number.

421002303 is a deficient number, since it is larger than the sum of its proper divisors (146977473).

421002303 is a wasteful number, since it uses less digits than its factorization.

421002303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 421002303 is about 20518.3406492825. The cubic root of 421002303 is about 749.4824892145.

Adding to 421002303 its reverse (303200124), we get a palindrome (724202427).

The spelling of 421002303 in words is "four hundred twenty-one million, two thousand, three hundred three".