861200 has 30 divisors (see below), whose sum is σ = 2069994. Its totient is φ = 344320.

The previous prime is 861199. The next prime is 861221. The reversal of 861200 is 2168.

It can be written as a sum of positive squares in 3 ways, for example, as 16 + 861184 = 4^2 + 928^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 677 + ... + 1476.

2⁸⁶¹²⁰⁰ is an apocalyptic number.

861200 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

861200 is an abundant number, since it is smaller than the sum of its proper divisors (1208794).

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

861200 is a wasteful number, since it uses less digits than its factorization.

861200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171 (or 2160 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 861200 is about 928.0086206496. The cubic root of 861200 is about 95.1410646689.

Adding to 861200 its reverse (2168), we get a palindrome (863368).

The spelling of 861200 in words is "eight hundred sixty-one thousand, two hundred".