861472 has 12 divisors (see below), whose sum is σ = 1696086. Its totient is φ = 430720.

The previous prime is 861439. The next prime is 861491. The reversal of 861472 is 274168.

It can be written as a sum of positive squares in only one way, i.e., 456976 + 404496 = 676^2 + 636^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 861472.

It is an unprimeable 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, 13429 + ... + 13492.

2⁸⁶¹⁴⁷² is an apocalyptic number.

It is an amenable number.

861472 is a deficient number, since it is larger than the sum of its proper divisors (834614).

861472 is a wasteful number, since it uses less digits than its factorization.

861472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26931 (or 26923 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 861472 is about 928.1551594426. The cubic root of 861472 is about 95.1510800140.

The spelling of 861472 in words is "eight hundred sixty-one thousand, four hundred seventy-two".