421553003 has 4 divisors (see below), whose sum is σ = 421613088. Its totient is φ = 421492920.

The previous prime is 421552997. The next prime is 421553023. The reversal of 421553003 is 300355124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421553003 - 2¹⁶ = 421487467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421553003.

It is not an unprimeable number, because it can be changed into a prime (421553023) 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 3 ways as a sum of consecutive naturals, for example, 17876 + ... + 34097.

It is an arithmetic number, because the mean of its divisors is an integer number (105403272).

Almost surely, 2^421553003 is an apocalyptic number.

421553003 is a deficient number, since it is larger than the sum of its proper divisors (60085).

421553003 is an equidigital number, since it uses as much as digits as its factorization.

421553003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60084.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 421553003 is about 20531.7559648463. The cubic root of 421553003 is about 749.8091383962.

The spelling of 421553003 in words is "four hundred twenty-one million, five hundred fifty-three thousand, three".