861471 has 24 divisors (see below), whose sum is σ = 1383200. Its totient is φ = 513216.

The previous prime is 861439. The next prime is 861491. The reversal of 861471 is 174168.

It is a happy number.

861471 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 861471 - 2⁵ = 861439 is a prime.

It is a super-3 number, since 3×861471³ = 1917976322078370333, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861491) 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 23 ways as a sum of consecutive naturals, for example, 4230 + ... + 4428.

2⁸⁶¹⁴⁷¹ is an apocalyptic number.

861471 is a deficient number, since it is larger than the sum of its proper divisors (521729).

861471 is a wasteful number, since it uses less digits than its factorization.

861471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 252 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 861471 is about 928.1546207395. The cubic root of 861471 is about 95.1510431967.

The spelling of 861471 in words is "eight hundred sixty-one thousand, four hundred seventy-one".