856147 has 2 divisors, whose sum is σ = 856148. Its totient is φ = 856146.

The previous prime is 856139. The next prime is 856153. The reversal of 856147 is 741658.

856147 is nontrivially palindromic in base 8.

856147 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856147 - 2³ = 856139 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (856117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428073 + 428074.

It is an arithmetic number, because the mean of its divisors is an integer number (428074).

2⁸⁵⁶¹⁴⁷ is an apocalyptic number.

856147 is a deficient number, since it is larger than the sum of its proper divisors (1).

856147 is an equidigital number, since it uses as much as digits as its factorization.

856147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 856147 is about 925.2821191399. The cubic root of 856147 is about 94.9546228349.

The spelling of 856147 in words is "eight hundred fifty-six thousand, one hundred forty-seven".