861512 has 16 divisors (see below), whose sum is σ = 1631340. Its totient is φ = 426496.

The previous prime is 861499. The next prime is 861541. The reversal of 861512 is 215168.

It can be written as a sum of positive squares in 2 ways, for example, as 749956 + 111556 = 866^2 + 334^2 .

It is a super-2 number, since 2×861512² = 1484405852288, which contains 22 as substring.

It is a plaindrome in base 12.

It is an unprimeable number.

861512 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428 + ... + 1380.

2⁸⁶¹⁵¹² is an apocalyptic number.

It is an amenable number.

861512 is a deficient number, since it is larger than the sum of its proper divisors (769828).

861512 is a wasteful number, since it uses less digits than its factorization.

861512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1068 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 861512 is about 928.1767073139. The cubic root of 861512 is about 95.1525526810.

The spelling of 861512 in words is "eight hundred sixty-one thousand, five hundred twelve".