851387 has 2 divisors, whose sum is σ = 851388. Its totient is φ = 851386.

The previous prime is 851381. The next prime is 851393. The reversal of 851387 is 783158.

It is a balanced prime because it is at equal distance from previous prime (851381) and next prime (851393).

It is a cyclic number.

It is not a de Polignac number, because 851387 - 2⁸ = 851131 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (851381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425693 + 425694.

It is an arithmetic number, because the mean of its divisors is an integer number (425694).

2⁸⁵¹³⁸⁷ is an apocalyptic number.

851387 is a deficient number, since it is larger than the sum of its proper divisors (1).

851387 is an equidigital number, since it uses as much as digits as its factorization.

851387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 32.

The square root of 851387 is about 922.7063454859. The cubic root of 851387 is about 94.7783196815.

The spelling of 851387 in words is "eight hundred fifty-one thousand, three hundred eighty-seven".