85847121 has 20 divisors (see below), whose sum is σ = 130666932. Its totient is φ = 56148768.

The previous prime is 85847107. The next prime is 85847123. The reversal of 85847121 is 12174858.

85847121 is a `hidden beast` number, since 8 + 584 + 71 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 68707521 + 17139600 = 8289^2 + 4140^2 .

It is not a de Polignac number, because 85847121 - 2⁵ = 85847089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85847123) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5706 + ... + 14291.

Almost surely, 2^85847121 is an apocalyptic number.

85847121 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

85847121 is a deficient number, since it is larger than the sum of its proper divisors (44819811).

85847121 is a wasteful number, since it uses less digits than its factorization.

85847121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20062 (or 20053 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 85847121 is about 9265.3721457910. The cubic root of 85847121 is about 441.1387873602.

The spelling of 85847121 in words is "eighty-five million, eight hundred forty-seven thousand, one hundred twenty-one".