8421485 has 4 divisors (see below), whose sum is σ = 10105788. Its totient is φ = 6737184.

The previous prime is 8421463. The next prime is 8421487. The reversal of 8421485 is 5841248.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 946729 + 7474756 = 973^2 + 2734^2 .

It is a cyclic number.

It is not a de Polignac number, because 8421485 - 2⁸ = 8421229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842144 + ... + 842153.

It is an arithmetic number, because the mean of its divisors is an integer number (2526447).

Almost surely, 2^8421485 is an apocalyptic number.

It is an amenable number.

8421485 is a deficient number, since it is larger than the sum of its proper divisors (1684303).

8421485 is a wasteful number, since it uses less digits than its factorization.

8421485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684302.

The product of its digits is 10240, while the sum is 32.

The square root of 8421485 is about 2901.9794968263. The cubic root of 8421485 is about 203.4524355227.

The spelling of 8421485 in words is "eight million, four hundred twenty-one thousand, four hundred eighty-five".