851310125 has 8 divisors (see below), whose sum is σ = 1062435192. Its totient is φ = 681048000.

The previous prime is 851310077. The next prime is 851310137. The reversal of 851310125 is 521013158.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20775364 + 830534761 = 4558^2 + 28819^2 .

It is not a de Polignac number, because 851310125 - 2¹⁰ = 851309101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 851310094 and 851310103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3405116 + ... + 3405365.

It is an arithmetic number, because the mean of its divisors is an integer number (132804399).

Almost surely, 2^851310125 is an apocalyptic number.

It is an amenable number.

851310125 is a deficient number, since it is larger than the sum of its proper divisors (211125067).

851310125 is an equidigital number, since it uses as much as digits as its factorization.

851310125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810496 (or 6810486 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 851310125 is about 29177.2192814874. The cubic root of 851310125 is about 947.7546696291.

The spelling of 851310125 in words is "eight hundred fifty-one million, three hundred ten thousand, one hundred twenty-five".