855069 has 4 divisors (see below), whose sum is σ = 1140096. Its totient is φ = 570044.

The previous prime is 855067. The next prime is 855079. The reversal of 855069 is 960558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 855069 - 2¹ = 855067 is a prime.

It is a super-2 number, since 2×855069² = 1462285989522, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

855069 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142509 + ... + 142514.

It is an arithmetic number, because the mean of its divisors is an integer number (285024).

2⁸⁵⁵⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

855069 is a deficient number, since it is larger than the sum of its proper divisors (285027).

855069 is a wasteful number, since it uses less digits than its factorization.

855069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285026.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 855069 is about 924.6994106195. The cubic root of 855069 is about 94.9147527053.

The spelling of 855069 in words is "eight hundred fifty-five thousand, sixty-nine".