85841281 has 4 divisors (see below), whose sum is σ = 85908564. Its totient is φ = 85774000.

The previous prime is 85841269. The next prime is 85841299. The reversal of 85841281 is 18214858.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18214858 = 2 ⋅9107429.

It can be written as a sum of positive squares in 2 ways, for example, as 25250625 + 60590656 = 5025^2 + 7784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85841281 is a prime.

It is a super-2 number, since 2×85841281² = 14737451047441922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85841281.

It is not an unprimeable number, because it can be changed into a prime (85848281) 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, 31690 + ... + 34291.

It is an arithmetic number, because the mean of its divisors is an integer number (21477141).

Almost surely, 2^85841281 is an apocalyptic number.

It is an amenable number.

85841281 is a deficient number, since it is larger than the sum of its proper divisors (67283).

85841281 is a wasteful number, since it uses less digits than its factorization.

85841281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67282.

The product of its digits is 20480, while the sum is 37.

The square root of 85841281 is about 9265.0569884918. The cubic root of 85841281 is about 441.1287838838.

The spelling of 85841281 in words is "eighty-five million, eight hundred forty-one thousand, two hundred eighty-one".