856069 has 8 divisors (see below), whose sum is σ = 931608. Its totient is φ = 783360.

The previous prime is 856061. The next prime is 856073. The reversal of 856069 is 960658.

It can be written as a sum of positive squares in 4 ways, for example, as 263169 + 592900 = 513^2 + 770^2 .

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

It is not a de Polignac number, because 856069 - 2³ = 856061 is a prime.

It is a super-2 number, since 2×856069² = 1465708265522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52 + ... + 1309.

It is an arithmetic number, because the mean of its divisors is an integer number (116451).

2⁸⁵⁶⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

856069 is a deficient number, since it is larger than the sum of its proper divisors (75539).

856069 is a wasteful number, since it uses less digits than its factorization.

856069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 856069 is about 925.2399688729. The cubic root of 856069 is about 94.9517391067.

The spelling of 856069 in words is "eight hundred fifty-six thousand, sixty-nine".