1279585 has 4 divisors (see below), whose sum is σ = 1535508. Its totient is φ = 1023664.

The previous prime is 1279583. The next prime is 1279601. The reversal of 1279585 is 5859721.

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 772641 + 506944 = 879^2 + 712^2 .

It is a cyclic number.

It is not a de Polignac number, because 1279585 - 2¹ = 1279583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1279583) 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, 127954 + ... + 127963.

It is an arithmetic number, because the mean of its divisors is an integer number (383877).

2^1279585 is an apocalyptic number.

It is an amenable number.

1279585 is a deficient number, since it is larger than the sum of its proper divisors (255923).

1279585 is an equidigital number, since it uses as much as digits as its factorization.

1279585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255922.

The product of its digits is 25200, while the sum is 37.

The square root of 1279585 is about 1131.1874292088. The cubic root of 1279585 is about 108.5649691943.

It can be divided in two parts, 12795 and 85, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 1279585 in words is "one million, two hundred seventy-nine thousand, five hundred eighty-five".