421534303 has 4 divisors (see below), whose sum is σ = 432927160. Its totient is φ = 410141448.

The previous prime is 421534277. The next prime is 421534357. The reversal of 421534303 is 303435124.

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

It is not a de Polignac number, because 421534303 - 2²⁵ = 387979871 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 (421534403) 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, 5696373 + ... + 5696446.

It is an arithmetic number, because the mean of its divisors is an integer number (108231790).

Almost surely, 2^421534303 is an apocalyptic number.

421534303 is a deficient number, since it is larger than the sum of its proper divisors (11392857).

421534303 is a wasteful number, since it uses less digits than its factorization.

421534303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11392856.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 421534303 is about 20531.3005676698. The cubic root of 421534303 is about 749.7980511086.

Adding to 421534303 its reverse (303435124), we get a palindrome (724969427).

The spelling of 421534303 in words is "four hundred twenty-one million, five hundred thirty-four thousand, three hundred three".