8421303 has 8 divisors (see below), whose sum is σ = 12249216. Its totient is φ = 5103800.

The previous prime is 8421251. The next prime is 8421403. The reversal of 8421303 is 3031248.

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 a de Polignac number, because none of the positive numbers 2^k-8421303 is a prime.

8421303 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8421303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421403) 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, 127563 + ... + 127628.

It is an arithmetic number, because the mean of its divisors is an integer number (1531152).

Almost surely, 2^8421303 is an apocalyptic number.

8421303 is a deficient number, since it is larger than the sum of its proper divisors (3827913).

8421303 is a wasteful number, since it uses less digits than its factorization.

8421303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255205.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 8421303 is about 2901.9481387509. The cubic root of 8421303 is about 203.4509698821.

It can be divided in two parts, 842 and 1303, that added together give a triangular number (2145 = T₆₅).

The spelling of 8421303 in words is "eight million, four hundred twenty-one thousand, three hundred three".