861672141 has 64 divisors (see below), whose sum is σ = 1440384000. Its totient is φ = 504584640.

The previous prime is 861672139. The next prime is 861672151. The reversal of 861672141 is 141276168.

It is a happy number.

861672141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 861672141 - 2¹ = 861672139 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 861672096 and 861672105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861672131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1391730 + ... + 1392348.

It is an arithmetic number, because the mean of its divisors is an integer number (22506000).

Almost surely, 2^861672141 is an apocalyptic number.

It is an amenable number.

861672141 is a deficient number, since it is larger than the sum of its proper divisors (578711859).

861672141 is a wasteful number, since it uses less digits than its factorization.

861672141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 785 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 861672141 is about 29354.2525198650. The cubic root of 861672141 is about 951.5844808386.

The spelling of 861672141 in words is "eight hundred sixty-one million, six hundred seventy-two thousand, one hundred forty-one".