1285165 has 16 divisors (see below), whose sum is σ = 1790208. Its totient is φ = 867456.

The previous prime is 1285159. The next prime is 1285169. The reversal of 1285165 is 5615821.

1285165 = 95² + 96² + ... + 167².

It is a cyclic number.

It is not a de Polignac number, because 1285165 - 2¹³ = 1276973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285169) 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 15 ways as a sum of consecutive naturals, for example, 2304 + ... + 2806.

It is an arithmetic number, because the mean of its divisors is an integer number (111888).

2^1285165 is an apocalyptic number.

It is an amenable number.

1285165 is a deficient number, since it is larger than the sum of its proper divisors (505043).

1285165 is an equidigital number, since it uses as much as digits as its factorization.

1285165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588.

The product of its digits is 2400, while the sum is 28.

The square root of 1285165 is about 1133.6511809194. The cubic root of 1285165 is about 108.7225499926.

The spelling of 1285165 in words is "one million, two hundred eighty-five thousand, one hundred sixty-five".