8521423 has 4 divisors (see below), whose sum is σ = 8539000. Its totient is φ = 8503848.

The previous prime is 8521417. The next prime is 8521427. The reversal of 8521423 is 3241258.

8521423 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3241258 = 2 ⋅1620629.

It is a cyclic number.

It is not a de Polignac number, because 8521423 - 2⁵ = 8521391 is a prime.

It is a super-2 number, since 2×8521423² = 145229299889858, which contains 22 as substring.

It is a d-powerful number, because it can be written as 8³ + 5³ + 2¹⁷ + 1 + 4⁵ + 2²³ + 3⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8521427) 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, 8040 + ... + 9037.

It is an arithmetic number, because the mean of its divisors is an integer number (2134750).

Almost surely, 2^8521423 is an apocalyptic number.

8521423 is a deficient number, since it is larger than the sum of its proper divisors (17577).

8521423 is a wasteful number, since it uses less digits than its factorization.

8521423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17576.

The product of its digits is 1920, while the sum is 25.

The square root of 8521423 is about 2919.1476495717. The cubic root of 8521423 is about 204.2540647801.

The spelling of 8521423 in words is "eight million, five hundred twenty-one thousand, four hundred twenty-three".