861080212 has 6 divisors (see below), whose sum is σ = 1506890378. Its totient is φ = 430540104.

The previous prime is 861080201. The next prime is 861080219. The reversal of 861080212 is 212080168.

It can be written as a sum of positive squares in only one way, i.e., 712142596 + 148937616 = 26686^2 + 12204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861080219) 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 as a sum of consecutive naturals, namely, 107635023 + ... + 107635030.

Almost surely, 2^861080212 is an apocalyptic number.

It is an amenable number.

861080212 is a deficient number, since it is larger than the sum of its proper divisors (645810166).

861080212 is a wasteful number, since it uses less digits than its factorization.

861080212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215270057 (or 215270055 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 861080212 is about 29344.1682792340. The cubic root of 861080212 is about 951.3665327146.

The spelling of 861080212 in words is "eight hundred sixty-one million, eighty thousand, two hundred twelve".