85642841 has 4 divisors (see below), whose sum is σ = 87046884. Its totient is φ = 84238800.

The previous prime is 85642811. The next prime is 85642847. The reversal of 85642841 is 14824658.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15015625 + 70627216 = 3875^2 + 8404^2 .

It is a cyclic number.

It is not a de Polignac number, because 85642841 - 2¹⁰ = 85641817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85642795 and 85642804.

It is not an unprimeable number, because it can be changed into a prime (85642847) 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, 701930 + ... + 702051.

It is an arithmetic number, because the mean of its divisors is an integer number (21761721).

Almost surely, 2^85642841 is an apocalyptic number.

It is an amenable number.

85642841 is a deficient number, since it is larger than the sum of its proper divisors (1404043).

85642841 is a wasteful number, since it uses less digits than its factorization.

85642841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404042.

The product of its digits is 61440, while the sum is 38.

The square root of 85642841 is about 9254.3417378007. The cubic root of 85642841 is about 440.7886012607.

The spelling of 85642841 in words is "eighty-five million, six hundred forty-two thousand, eight hundred forty-one".