856453143 has 32 divisors (see below), whose sum is σ = 1453939200. Its totient is φ = 436173696.

The previous prime is 856453127. The next prime is 856453153. The reversal of 856453143 is 341354658.

It is not a de Polignac number, because 856453143 - 2⁴ = 856453127 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856453123) 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 31 ways as a sum of consecutive naturals, for example, 46173 + ... + 62006.

It is an arithmetic number, because the mean of its divisors is an integer number (45435600).

Almost surely, 2^856453143 is an apocalyptic number.

856453143 is a deficient number, since it is larger than the sum of its proper divisors (597486057).

856453143 is a wasteful number, since it uses less digits than its factorization.

856453143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108231.

The product of its digits is 172800, while the sum is 39.

The square root of 856453143 is about 29265.2207064973. The cubic root of 856453143 is about 949.6593951639.

It can be divided in two parts, 85645 and 3143, that added together give a palindrome (88788).

The spelling of 856453143 in words is "eight hundred fifty-six million, four hundred fifty-three thousand, one hundred forty-three".