421055503 has 8 divisors (see below), whose sum is σ = 479304576. Its totient is φ = 366135000.

The previous prime is 421055491. The next prime is 421055519. The reversal of 421055503 is 305550124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421055503 - 2⁵ = 421055471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421055203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831873 + ... + 832378.

It is an arithmetic number, because the mean of its divisors is an integer number (59913072).

Almost surely, 2^421055503 is an apocalyptic number.

421055503 is a deficient number, since it is larger than the sum of its proper divisors (58249073).

421055503 is a wasteful number, since it uses less digits than its factorization.

421055503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664285.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 421055503 is about 20519.6370094600. The cubic root of 421055503 is about 749.5140573625.

The spelling of 421055503 in words is "four hundred twenty-one million, fifty-five thousand, five hundred three".