855072 has 36 divisors (see below), whose sum is σ = 2432430. Its totient is φ = 284928.

The previous prime is 855067. The next prime is 855079. The reversal of 855072 is 270558.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 853776 + 1296 = 924^2 + 36^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×855072² = 1462296250368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (855079) by changing a digit.

855072 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 in 5 ways as a sum of consecutive naturals, for example, 1197 + ... + 1772.

2⁸⁵⁵⁰⁷² is an apocalyptic number.

It is an amenable number.

855072 is an abundant number, since it is smaller than the sum of its proper divisors (1577358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

855072 is a wasteful number, since it uses less digits than its factorization.

855072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985 (or 2974 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 855072 is about 924.7010327668. The cubic root of 855072 is about 94.9148637076.

The spelling of 855072 in words is "eight hundred fifty-five thousand, seventy-two".