421205103 has 40 divisors (see below), whose sum is σ = 692865360. Its totient is φ = 252875520.

The previous prime is 421205101. The next prime is 421205111. The reversal of 421205103 is 301502124.

It is not a de Polignac number, because 421205103 - 2¹ = 421205101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421205101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 94951 + ... + 99287.

It is an arithmetic number, because the mean of its divisors is an integer number (17321634).

Almost surely, 2^421205103 is an apocalyptic number.

421205103 is a deficient number, since it is larger than the sum of its proper divisors (271660257).

421205103 is a wasteful number, since it uses less digits than its factorization.

421205103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4469 (or 4460 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 421205103 is about 20523.2819743822. The cubic root of 421205103 is about 749.6028136945.

Adding to 421205103 its reverse (301502124), we get a palindrome (722707227).

The spelling of 421205103 in words is "four hundred twenty-one million, two hundred five thousand, one hundred three".