856546 has 4 divisors (see below), whose sum is σ = 1284822. Its totient is φ = 428272.

The previous prime is 856529. The next prime is 856547. The reversal of 856546 is 645658.

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

It can be written as a sum of positive squares in only one way, i.e., 837225 + 19321 = 915^2 + 139^2 .

It is not an unprimeable number, because it can be changed into a prime (856547) by changing a digit.

856546 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 as a sum of consecutive naturals, namely, 214135 + ... + 214138.

2⁸⁵⁶⁵⁴⁶ is an apocalyptic number.

856546 is a deficient number, since it is larger than the sum of its proper divisors (428276).

856546 is a wasteful number, since it uses less digits than its factorization.

856546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428275.

The product of its digits is 28800, while the sum is 34.

The square root of 856546 is about 925.4977039410. The cubic root of 856546 is about 94.9693714744.

The spelling of 856546 in words is "eight hundred fifty-six thousand, five hundred forty-six".