845542143 has 24 divisors (see below), whose sum is σ = 1269864960. Its totient is φ = 541561680.

The previous prime is 845542133. The next prime is 845542151. The reversal of 845542143 is 341245548.

It is a happy number.

845542143 is a `hidden beast` number, since 84 + 554 + 21 + 4 + 3 = 666.

It is not a de Polignac number, because 845542143 - 2⁴ = 845542127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 845542098 and 845542107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845542133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27880 + ... + 49682.

It is an arithmetic number, because the mean of its divisors is an integer number (52911040).

Almost surely, 2^845542143 is an apocalyptic number.

845542143 is a deficient number, since it is larger than the sum of its proper divisors (424322817).

845542143 is a wasteful number, since it uses less digits than its factorization.

845542143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21979 (or 21976 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 845542143 is about 29078.2073553374. The cubic root of 845542143 is about 945.6093391021.

The spelling of 845542143 in words is "eight hundred forty-five million, five hundred forty-two thousand, one hundred forty-three".