851087 has 2 divisors, whose sum is σ = 851088. Its totient is φ = 851086.

The previous prime is 851057. The next prime is 851093. The reversal of 851087 is 780158.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 851087 - 2¹⁰ = 850063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851017) 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 as a sum of consecutive naturals, namely, 425543 + 425544.

It is an arithmetic number, because the mean of its divisors is an integer number (425544).

2⁸⁵¹⁰⁸⁷ is an apocalyptic number.

851087 is a deficient number, since it is larger than the sum of its proper divisors (1).

851087 is an equidigital number, since it uses as much as digits as its factorization.

851087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 851087 is about 922.5437658995. The cubic root of 851087 is about 94.7671861483.

The spelling of 851087 in words is "eight hundred fifty-one thousand, eighty-seven".