861316 has 6 divisors (see below), whose sum is σ = 1507310. Its totient is φ = 430656.

The previous prime is 861299. The next prime is 861317. The reversal of 861316 is 613168.

It can be written as a sum of positive squares in only one way, i.e., 817216 + 44100 = 904^2 + 210^2 .

It is not an unprimeable number, because it can be changed into a prime (861317) by changing a digit.

861316 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 as a sum of consecutive naturals, namely, 107661 + ... + 107668.

2⁸⁶¹³¹⁶ is an apocalyptic number.

It is an amenable number.

861316 is a deficient number, since it is larger than the sum of its proper divisors (645994).

861316 is a wasteful number, since it uses less digits than its factorization.

861316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215333 (or 215331 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 861316 is about 928.0711179646. The cubic root of 861316 is about 95.1453361768.

The spelling of 861316 in words is "eight hundred sixty-one thousand, three hundred sixteen".