851398 has 8 divisors (see below), whose sum is σ = 1289808. Its totient is φ = 421464.

The previous prime is 851393. The next prime is 851401. The reversal of 851398 is 893158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851393) 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, 1861 + ... + 2272.

It is an arithmetic number, because the mean of its divisors is an integer number (161226).

2⁸⁵¹³⁹⁸ is an apocalyptic number.

851398 is a deficient number, since it is larger than the sum of its proper divisors (438410).

851398 is a wasteful number, since it uses less digits than its factorization.

851398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238.

The product of its digits is 8640, while the sum is 34.

The square root of 851398 is about 922.7123061930. The cubic root of 851398 is about 94.7787278614.

The spelling of 851398 in words is "eight hundred fifty-one thousand, three hundred ninety-eight".