1282705 has 4 divisors (see below), whose sum is σ = 1539252. Its totient is φ = 1026160.

The previous prime is 1282703. The next prime is 1282717. The reversal of 1282705 is 5072821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 678976 + 603729 = 824^2 + 777^2 .

It is not a de Polignac number, because 1282705 - 2¹ = 1282703 is a prime.

It is a Duffinian number.

1282705 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1282705.

It is not an unprimeable number, because it can be changed into a prime (1282703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128266 + ... + 128275.

It is an arithmetic number, because the mean of its divisors is an integer number (384813).

2^1282705 is an apocalyptic number.

It is an amenable number.

1282705 is a deficient number, since it is larger than the sum of its proper divisors (256547).

1282705 is an equidigital number, since it uses as much as digits as its factorization.

1282705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256546.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1282705 is about 1132.5656713851. The cubic root of 1282705 is about 108.6531352207.

The spelling of 1282705 in words is "one million, two hundred eighty-two thousand, seven hundred five".