8420534 has 32 divisors (see below), whose sum is σ = 14035680. Its totient is φ = 3773952.

The previous prime is 8420521. The next prime is 8420543. The reversal of 8420534 is 4350248.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74462 + ... + 74574.

It is an arithmetic number, because the mean of its divisors is an integer number (438615).

Almost surely, 2^8420534 is an apocalyptic number.

8420534 is a deficient number, since it is larger than the sum of its proper divisors (5615146).

8420534 is a wasteful number, since it uses less digits than its factorization.

8420534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 8420534 is about 2901.8156385270. The cubic root of 8420534 is about 203.4447769150. Note that the first 3 decimals are identical.

The spelling of 8420534 in words is "eight million, four hundred twenty thousand, five hundred thirty-four".