8520143 has 4 divisors (see below), whose sum is σ = 8890608. Its totient is φ = 8149680.

The previous prime is 8520139. The next prime is 8520157. The reversal of 8520143 is 3410258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3410258 = 2 ⋅1705129.

It is a cyclic number.

It is not a de Polignac number, because 8520143 - 2² = 8520139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 370441 = 8520143 / (8 + 5 + 2 + 0 + 1 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8520103) 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, 185198 + ... + 185243.

It is an arithmetic number, because the mean of its divisors is an integer number (2222652).

Almost surely, 2^8520143 is an apocalyptic number.

8520143 is a deficient number, since it is larger than the sum of its proper divisors (370465).

8520143 is a wasteful number, since it uses less digits than its factorization.

8520143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370464.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 8520143 is about 2918.9283992589. The cubic root of 8520143 is about 204.2438372905.

The spelling of 8520143 in words is "eight million, five hundred twenty thousand, one hundred forty-three".