861465 has 32 divisors (see below), whose sum is σ = 1575936. Its totient is φ = 397760.

The previous prime is 861439. The next prime is 861491. The reversal of 861465 is 564168.

It is an interprime number because it is at equal distance from previous prime (861439) and next prime (861491).

It is not a de Polignac number, because 861465 - 2⁵ = 861433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3682 + ... + 3908.

It is an arithmetic number, because the mean of its divisors is an integer number (49248).

2⁸⁶¹⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

861465 is a deficient number, since it is larger than the sum of its proper divisors (714471).

861465 is a wasteful number, since it uses less digits than its factorization.

861465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269.

The product of its digits is 5760, while the sum is 30.

The square root of 861465 is about 928.1513885137. The cubic root of 861465 is about 95.1508222925.

It can be divided in two parts, 861 and 465, that added together give a triangular number (1326 = T₅₁).

The spelling of 861465 in words is "eight hundred sixty-one thousand, four hundred sixty-five".