851263 has 4 divisors (see below), whose sum is σ = 972880. Its totient is φ = 729648.

The previous prime is 851261. The next prime is 851267. The reversal of 851263 is 362158.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 851263 - 2¹ = 851261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60798 + ... + 60811.

It is an arithmetic number, because the mean of its divisors is an integer number (243220).

2⁸⁵¹²⁶³ is an apocalyptic number.

851263 is a deficient number, since it is larger than the sum of its proper divisors (121617).

851263 is a wasteful number, since it uses less digits than its factorization.

851263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121616.

The product of its digits is 1440, while the sum is 25.

The square root of 851263 is about 922.6391493970. The cubic root of 851263 is about 94.7737181383.

The spelling of 851263 in words is "eight hundred fifty-one thousand, two hundred sixty-three".