851996 has 6 divisors (see below), whose sum is σ = 1491000. Its totient is φ = 425996.

The previous prime is 851971. The next prime is 852011. The reversal of 851996 is 699158.

It is a congruent number.

It is an unprimeable number.

851996 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 as a sum of consecutive naturals, namely, 106496 + ... + 106503.

It is an arithmetic number, because the mean of its divisors is an integer number (248500).

2⁸⁵¹⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

851996 is a deficient number, since it is larger than the sum of its proper divisors (639004).

851996 is a wasteful number, since it uses less digits than its factorization.

851996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213003 (or 213001 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 851996 is about 923.0362939777. The cubic root of 851996 is about 94.8009127129.

The spelling of 851996 in words is "eight hundred fifty-one thousand, nine hundred ninety-six".