8478143 has 4 divisors (see below), whose sum is σ = 8707320. Its totient is φ = 8248968.

The previous prime is 8478137. The next prime is 8478149. The reversal of 8478143 is 3418748.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (8478137) and next prime (8478149).

It is a cyclic number.

It is not a de Polignac number, because 8478143 - 2¹² = 8474047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8478149) 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, 114533 + ... + 114606.

It is an arithmetic number, because the mean of its divisors is an integer number (2176830).

Almost surely, 2^8478143 is an apocalyptic number.

8478143 is a deficient number, since it is larger than the sum of its proper divisors (229177).

8478143 is a wasteful number, since it uses less digits than its factorization.

8478143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229176.

The product of its digits is 21504, while the sum is 35.

The square root of 8478143 is about 2911.7250900454. The cubic root of 8478143 is about 203.9076780124.

The spelling of 8478143 in words is "eight million, four hundred seventy-eight thousand, one hundred forty-three".