845212128241 has 16 divisors (see below), whose sum is σ = 917990812368. Its totient is φ = 773556249600.

The previous prime is 845212128217. The next prime is 845212128251. The reversal of 845212128241 is 142821212548.

It can be written as a sum of positive squares in 8 ways, for example, as 7751041600 + 837461086641 = 88040^2 + 915129^2 .

It is a cyclic number.

It is not a de Polignac number, because 845212128241 - 2²⁷ = 845077910513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 845212128194 and 845212128203.

It is not an unprimeable number, because it can be changed into a prime (845212128251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1173181 + ... + 1751221.

It is an arithmetic number, because the mean of its divisors is an integer number (57374425773).

Almost surely, 2^845212128241 is an apocalyptic number.

It is an amenable number.

845212128241 is a deficient number, since it is larger than the sum of its proper divisors (72778684127).

845212128241 is a wasteful number, since it uses less digits than its factorization.

845212128241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579012.

The product of its digits is 81920, while the sum is 40.

The spelling of 845212128241 in words is "eight hundred forty-five billion, two hundred twelve million, one hundred twenty-eight thousand, two hundred forty-one".