851743252 has 12 divisors (see below), whose sum is σ = 1491153300. Its totient is φ = 425699456.

The previous prime is 851743237. The next prime is 851743289. The reversal of 851743252 is 252347158.

It can be written as a sum of positive squares in 2 ways, for example, as 831976336 + 19766916 = 28844^2 + 4446^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31573 + ... + 51964.

It is an arithmetic number, because the mean of its divisors is an integer number (124262775).

Almost surely, 2^851743252 is an apocalyptic number.

It is an amenable number.

851743252 is a deficient number, since it is larger than the sum of its proper divisors (639410048).

851743252 is a wasteful number, since it uses less digits than its factorization.

851743252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86090 (or 86088 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 851743252 is about 29184.6406864981. The cubic root of 851743252 is about 947.9153742995.

The spelling of 851743252 in words is "eight hundred fifty-one million, seven hundred forty-three thousand, two hundred fifty-two".