1282385 has 16 divisors (see below), whose sum is σ = 1681680. Its totient is φ = 933120.

The previous prime is 1282381. The next prime is 1282387. The reversal of 1282385 is 5832821.

It can be written as a sum of positive squares in 8 ways, for example, as 300304 + 982081 = 548^2 + 991^2 .

It is not a de Polignac number, because 1282385 - 2² = 1282381 is a prime.

It is a super-2 number, since 2×1282385² = 3289022576450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6995 + ... + 7175.

It is an arithmetic number, because the mean of its divisors is an integer number (105105).

2^1282385 is an apocalyptic number.

It is an amenable number.

1282385 is a deficient number, since it is larger than the sum of its proper divisors (399295).

1282385 is a wasteful number, since it uses less digits than its factorization.

1282385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308.

The product of its digits is 3840, while the sum is 29.

The square root of 1282385 is about 1132.4243904120. The cubic root of 1282385 is about 108.6440991355.

The spelling of 1282385 in words is "one million, two hundred eighty-two thousand, three hundred eighty-five".