8489021 has 4 divisors (see below), whose sum is σ = 8718492. Its totient is φ = 8259552.

The previous prime is 8489011. The next prime is 8489023. The reversal of 8489021 is 1209848.

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 4468996 + 4020025 = 2114^2 + 2005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8489021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8489023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114680 + ... + 114753.

It is an arithmetic number, because the mean of its divisors is an integer number (2179623).

Almost surely, 2^8489021 is an apocalyptic number.

It is an amenable number.

8489021 is a deficient number, since it is larger than the sum of its proper divisors (229471).

8489021 is a wasteful number, since it uses less digits than its factorization.

8489021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229470.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 8489021 is about 2913.5924560583. The cubic root of 8489021 is about 203.9948496072.

The spelling of 8489021 in words is "eight million, four hundred eighty-nine thousand, twenty-one".