851007 has 4 divisors (see below), whose sum is σ = 1134680. Its totient is φ = 567336.

The previous prime is 850979. The next prime is 851009. The reversal of 851007 is 700158.

It is a happy number.

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

It is not a de Polignac number, because 851007 - 2⁶ = 850943 is a prime.

It is a D-number.

It is the 923-rd Hogben number.

It is a Duffinian number.

851007 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 851007.

It is not an unprimeable number, because it can be changed into a prime (851009) by changing a digit.

It is a nontrivial repunit in base 922.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141832 + ... + 141837.

It is an arithmetic number, because the mean of its divisors is an integer number (283670).

2⁸⁵¹⁰⁰⁷ is an apocalyptic number.

851007 is a deficient number, since it is larger than the sum of its proper divisors (283673).

851007 is a wasteful number, since it uses less digits than its factorization.

851007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283672.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 851007 is about 922.5004065040. The cubic root of 851007 is about 94.7642167643.

It can be divided in two parts, 8 and 51007, that added together give a palindrome (51015).

The spelling of 851007 in words is "eight hundred fifty-one thousand, seven".