861208 has 16 divisors (see below), whose sum is σ = 1635480. Its totient is φ = 425088.

The previous prime is 861199. The next prime is 861221. The reversal of 861208 is 802168.

It is a congruent number.

It is an unprimeable number.

861208 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16 + ... + 1312.

2⁸⁶¹²⁰⁸ is an apocalyptic number.

It is an amenable number.

861208 is a deficient number, since it is larger than the sum of its proper divisors (774272).

861208 is a wasteful number, since it uses less digits than its factorization.

861208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 861208 is about 928.0129309444. The cubic root of 861208 is about 95.1413592679.

It can be divided in two parts, 8 and 61208, that added together give a palindrome (61216).

The spelling of 861208 in words is "eight hundred sixty-one thousand, two hundred eight".