8574021 has 6 divisors (see below), whose sum is σ = 12384710. Its totient is φ = 5716008.

The previous prime is 8574019. The next prime is 8574037. The reversal of 8574021 is 1204758.

It can be written as a sum of positive squares in only one way, i.e., 8328996 + 245025 = 2886^2 + 495^2 .

It is not a de Polignac number, because 8574021 - 2¹ = 8574019 is a prime.

It is a super-2 number, since 2×8574021² = 147027672216882, which contains 22 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 (8574061) 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, 476326 + ... + 476343.

Almost surely, 2^8574021 is an apocalyptic number.

It is an amenable number.

8574021 is a deficient number, since it is larger than the sum of its proper divisors (3810689).

8574021 is a wasteful number, since it uses less digits than its factorization.

8574021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952675 (or 952672 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 8574021 is about 2928.1429268395. The cubic root of 8574021 is about 204.6734519543.

Adding to 8574021 its reverse (1204758), we get a palindrome (9778779).

The spelling of 8574021 in words is "eight million, five hundred seventy-four thousand, twenty-one".