855149 has 4 divisors (see below), whose sum is σ = 865536. Its totient is φ = 844764.

The previous prime is 855143. The next prime is 855187. The reversal of 855149 is 941558.

855149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 941558 = 2 ⋅470779.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855143) 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, 5069 + ... + 5234.

It is an arithmetic number, because the mean of its divisors is an integer number (216384).

2⁸⁵⁵¹⁴⁹ is an apocalyptic number.

It is an amenable number.

855149 is a deficient number, since it is larger than the sum of its proper divisors (10387).

855149 is a wasteful number, since it uses less digits than its factorization.

855149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10386.

The product of its digits is 7200, while the sum is 32.

The square root of 855149 is about 924.7426669079. The cubic root of 855149 is about 94.9177126783.

The spelling of 855149 in words is "eight hundred fifty-five thousand, one hundred forty-nine".