421244503 has 8 divisors (see below), whose sum is σ = 430580160. Its totient is φ = 411924480.

The previous prime is 421244501. The next prime is 421244531. The reversal of 421244503 is 305442124.

It is a happy number.

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 421244503 - 2¹ = 421244501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421244501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63043 + ... + 69403.

It is an arithmetic number, because the mean of its divisors is an integer number (53822520).

Almost surely, 2^421244503 is an apocalyptic number.

421244503 is a deficient number, since it is larger than the sum of its proper divisors (9335657).

421244503 is a wasteful number, since it uses less digits than its factorization.

421244503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7817.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 421244503 is about 20524.2418373980. The cubic root of 421244503 is about 749.6261858631.

Adding to 421244503 its reverse (305442124), we get a palindrome (726686627).

The spelling of 421244503 in words is "four hundred twenty-one million, two hundred forty-four thousand, five hundred three".