861371 has 6 divisors (see below), whose sum is σ = 1002060. Its totient is φ = 738276.

The previous prime is 861361. The next prime is 861391. The reversal of 861371 is 173168.

It is a de Polignac number, because none of the positive numbers 2^k-861371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 861371.

It is not an unprimeable number, because it can be changed into a prime (861361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8741 + ... + 8838.

It is an arithmetic number, because the mean of its divisors is an integer number (167010).

2⁸⁶¹³⁷¹ is an apocalyptic number.

861371 is a deficient number, since it is larger than the sum of its proper divisors (140689).

861371 is a wasteful number, since it uses less digits than its factorization.

861371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17593 (or 17586 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 861371 is about 928.1007488414. The cubic root of 861371 is about 95.1473613268.

The spelling of 861371 in words is "eight hundred sixty-one thousand, three hundred seventy-one".