421780503 has 8 divisors (see below), whose sum is σ = 563200128. Its totient is φ = 280773944.

The previous prime is 421780483. The next prime is 421780511. The reversal of 421780503 is 305087124.

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

It is a cyclic number.

It is not a de Polignac number, because 421780503 - 2²⁸ = 153345047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421780543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100875 + ... + 104972.

It is an arithmetic number, because the mean of its divisors is an integer number (70400016).

Almost surely, 2^421780503 is an apocalyptic number.

421780503 is a deficient number, since it is larger than the sum of its proper divisors (141419625).

421780503 is a wasteful number, since it uses less digits than its factorization.

421780503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206533.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 421780503 is about 20537.2954159013. The cubic root of 421780503 is about 749.9439975962.

The spelling of 421780503 in words is "four hundred twenty-one million, seven hundred eighty thousand, five hundred three".