860155 has 4 divisors (see below), whose sum is σ = 1032192. Its totient is φ = 688120.

The previous prime is 860143. The next prime is 860239. The reversal of 860155 is 551068.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-860155 is a prime.

It is a Duffinian number.

860155 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86011 + ... + 86020.

It is an arithmetic number, because the mean of its divisors is an integer number (258048).

2⁸⁶⁰¹⁵⁵ is an apocalyptic number.

860155 is a deficient number, since it is larger than the sum of its proper divisors (172037).

860155 is a wasteful number, since it uses less digits than its factorization.

860155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172036.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 860155 is about 927.4454161836. The cubic root of 860155 is about 95.1025669705.

The spelling of 860155 in words is "eight hundred sixty thousand, one hundred fifty-five".