851265 has 12 divisors (see below), whose sum is σ = 1475604. Its totient is φ = 453984.

The previous prime is 851261. The next prime is 851267. The reversal of 851265 is 562158.

It can be written as a sum of positive squares in 2 ways, for example, as 505521 + 345744 = 711^2 + 588^2 .

It is not a de Polignac number, because 851265 - 2² = 851261 is a prime.

851265 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 851265.

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

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 11 ways as a sum of consecutive naturals, for example, 9414 + ... + 9503.

It is an arithmetic number, because the mean of its divisors is an integer number (122967).

2⁸⁵¹²⁶⁵ is an apocalyptic number.

It is an amenable number.

851265 is a deficient number, since it is larger than the sum of its proper divisors (624339).

851265 is a wasteful number, since it uses less digits than its factorization.

851265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18928 (or 18925 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 851265 is about 922.6402332437. The cubic root of 851265 is about 94.7737923603.

The spelling of 851265 in words is "eight hundred fifty-one thousand, two hundred sixty-five".