855487 has 4 divisors (see below), whose sum is σ = 867280. Its totient is φ = 843696.

The previous prime is 855467. The next prime is 855499. The reversal of 855487 is 784558.

855487 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784558 = 2 ⋅392279.

It is a cyclic number.

It is not a de Polignac number, because 855487 - 2⁷ = 855359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5787 + ... + 5932.

It is an arithmetic number, because the mean of its divisors is an integer number (216820).

2⁸⁵⁵⁴⁸⁷ is an apocalyptic number.

855487 is a deficient number, since it is larger than the sum of its proper divisors (11793).

855487 is a wasteful number, since it uses less digits than its factorization.

855487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11792.

The product of its digits is 44800, while the sum is 37.

The square root of 855487 is about 924.9254023974. The cubic root of 855487 is about 94.9302165269.

The spelling of 855487 in words is "eight hundred fifty-five thousand, four hundred eighty-seven".