855898 has 4 divisors (see below), whose sum is σ = 1283850. Its totient is φ = 427948.

The previous prime is 855889. The next prime is 855901. The reversal of 855898 is 898558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 851929 + 3969 = 923^2 + 63^2 .

It is a super-2 number, since 2×855898² = 1465122772808, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213973 + ... + 213976.

2⁸⁵⁵⁸⁹⁸ is an apocalyptic number.

855898 is a deficient number, since it is larger than the sum of its proper divisors (427952).

855898 is a wasteful number, since it uses less digits than its factorization.

855898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427951.

The product of its digits is 115200, while the sum is 43.

The square root of 855898 is about 925.1475557985. The cubic root of 855898 is about 94.9454164744.

The spelling of 855898 in words is "eight hundred fifty-five thousand, eight hundred ninety-eight".