861603252 has 12 divisors (see below), whose sum is σ = 2010407616. Its totient is φ = 287201080.

The previous prime is 861603227. The next prime is 861603263. The reversal of 861603252 is 252306168.

861603252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35900124 + ... + 35900147.

It is an arithmetic number, because the mean of its divisors is an integer number (167533968).

Almost surely, 2^861603252 is an apocalyptic number.

It is an amenable number.

861603252 is an abundant number, since it is smaller than the sum of its proper divisors (1148804364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861603252 is a wasteful number, since it uses less digits than its factorization.

861603252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71800278 (or 71800276 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 861603252 is about 29353.0790889133. The cubic root of 861603252 is about 951.5591210576.

The spelling of 861603252 in words is "eight hundred sixty-one million, six hundred three thousand, two hundred fifty-two".