8609021 has 6 divisors (see below), whose sum is σ = 9145530. Its totient is φ = 8102336.

The previous prime is 8608973. The next prime is 8609023. The reversal of 8609021 is 1209068.

It can be written as a sum of positive squares in 3 ways, for example, as 1243225 + 7365796 = 1115^2 + 2714^2 .

It is not a de Polignac number, because 8609021 - 2¹⁰ = 8607997 is a prime.

It is a super-3 number, since 3×8609021³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8609023) 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, 14606 + ... + 15183.

It is an arithmetic number, because the mean of its divisors is an integer number (1524255).

Almost surely, 2^8609021 is an apocalyptic number.

It is an amenable number.

8609021 is a deficient number, since it is larger than the sum of its proper divisors (536509).

8609021 is a wasteful number, since it uses less digits than its factorization.

8609021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29823 (or 29806 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 8609021 is about 2934.1133243282. The cubic root of 8609021 is about 204.9515729354.

The spelling of 8609021 in words is "eight million, six hundred nine thousand, twenty-one".