8420450 has 12 divisors (see below), whose sum is σ = 15662130. Its totient is φ = 3368160.

The previous prime is 8420449. The next prime is 8420453. The reversal of 8420450 is 540248.

It can be written as a sum of positive squares in 3 ways, for example, as 5396329 + 3024121 = 2323^2 + 1739^2 .

It is not an unprimeable number, because it can be changed into a prime (8420453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84155 + ... + 84254.

Almost surely, 2^8420450 is an apocalyptic number.

8420450 is a deficient number, since it is larger than the sum of its proper divisors (7241680).

8420450 is a wasteful number, since it uses less digits than its factorization.

8420450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168421 (or 168416 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 8420450 is about 2901.8011647940. The cubic root of 8420450 is about 203.4441004172. Note that the first 3 decimals are identical.

Adding to 8420450 its reverse (540248), we get a palindrome (8960698).

The spelling of 8420450 in words is "eight million, four hundred twenty thousand, four hundred fifty".