856145 has 8 divisors (see below), whose sum is σ = 1040256. Its totient is φ = 676336.

The previous prime is 856139. The next prime is 856147. The reversal of 856145 is 541658.

It is a happy number.

856145 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 856145 - 2⁶ = 856081 is a prime.

It is a super-2 number, since 2×856145² = 1465968522050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856147) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 617 + ... + 1446.

It is an arithmetic number, because the mean of its divisors is an integer number (130032).

2⁸⁵⁶¹⁴⁵ is an apocalyptic number.

It is an amenable number.

856145 is a deficient number, since it is larger than the sum of its proper divisors (184111).

856145 is a wasteful number, since it uses less digits than its factorization.

856145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151.

The product of its digits is 4800, while the sum is 29.

The square root of 856145 is about 925.2810383878. The cubic root of 856145 is about 94.9545488953.

It can be divided in two parts, 856 and 145, that added together give a palindrome (1001).

The spelling of 856145 in words is "eight hundred fifty-six thousand, one hundred forty-five".