851002 has 4 divisors (see below), whose sum is σ = 1276506. Its totient is φ = 425500.

The previous prime is 850979. The next prime is 851009. The reversal of 851002 is 200158.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 793881 + 57121 = 891^2 + 239^2 .

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212749 + ... + 212752.

2⁸⁵¹⁰⁰² is an apocalyptic number.

851002 is a deficient number, since it is larger than the sum of its proper divisors (425504).

851002 is a wasteful number, since it uses less digits than its factorization.

851002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425503.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 851002 is about 922.4976964741. The cubic root of 851002 is about 94.7640311716.

The spelling of 851002 in words is "eight hundred fifty-one thousand, two".