85724143 has 12 divisors (see below), whose sum is σ = 91595448. Its totient is φ = 80205840.

The previous prime is 85724141. The next prime is 85724167. The reversal of 85724143 is 34142758.

It is not a de Polignac number, because 85724143 - 2¹ = 85724141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85724099 and 85724108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85724141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28533 + ... + 31393.

It is an arithmetic number, because the mean of its divisors is an integer number (7632954).

Almost surely, 2^85724143 is an apocalyptic number.

85724143 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

85724143 is a deficient number, since it is larger than the sum of its proper divisors (5871305).

85724143 is a wasteful number, since it uses less digits than its factorization.

85724143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982 (or 2963 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 85724143 is about 9258.7333366935. The cubic root of 85724143 is about 440.9280394991.

The spelling of 85724143 in words is "eighty-five million, seven hundred twenty-four thousand, one hundred forty-three".