8420459 has 4 divisors (see below), whose sum is σ = 8440080. Its totient is φ = 8400840.

The previous prime is 8420453. The next prime is 8420483. The reversal of 8420459 is 9540248.

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 8420459 - 2⁴ = 8420443 is a prime.

It is a Duffinian number.

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

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 3 ways as a sum of consecutive naturals, for example, 9152 + ... + 10029.

It is an arithmetic number, because the mean of its divisors is an integer number (2110020).

Almost surely, 2^8420459 is an apocalyptic number.

8420459 is a deficient number, since it is larger than the sum of its proper divisors (19621).

8420459 is a wasteful number, since it uses less digits than its factorization.

8420459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19620.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 8420459 is about 2901.8027155546. The cubic root of 8420459 is about 203.4441728993. Note that the first 3 decimals are identical.

The spelling of 8420459 in words is "eight million, four hundred twenty thousand, four hundred fifty-nine".