7872143 has 4 divisors (see below), whose sum is σ = 8020728. Its totient is φ = 7723560.

The previous prime is 7872131. The next prime is 7872149. The reversal of 7872143 is 3412787.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7872143 - 2⁴ = 7872127 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7872149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74213 + ... + 74318.

It is an arithmetic number, because the mean of its divisors is an integer number (2005182).

Almost surely, 2^7872143 is an apocalyptic number.

7872143 is a deficient number, since it is larger than the sum of its proper divisors (148585).

7872143 is a wasteful number, since it uses less digits than its factorization.

7872143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148584.

The product of its digits is 9408, while the sum is 32.

The square root of 7872143 is about 2805.7339503239. The cubic root of 7872143 is about 198.9287978732.

The spelling of 7872143 in words is "seven million, eight hundred seventy-two thousand, one hundred forty-three".