8420315 has 4 divisors (see below), whose sum is σ = 10104384. Its totient is φ = 6736248.

The previous prime is 8420311. The next prime is 8420317. The reversal of 8420315 is 5130248.

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 8420315 - 2² = 8420311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8420311) 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, 842027 + ... + 842036.

It is an arithmetic number, because the mean of its divisors is an integer number (2526096).

Almost surely, 2^8420315 is an apocalyptic number.

8420315 is a deficient number, since it is larger than the sum of its proper divisors (1684069).

8420315 is a wasteful number, since it uses less digits than its factorization.

8420315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684068.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 8420315 is about 2901.7779032862. Note that the first 3 decimals coincide. The cubic root of 8420315 is about 203.4430131792.

The spelling of 8420315 in words is "eight million, four hundred twenty thousand, three hundred fifteen".