1308985 has 8 divisors (see below), whose sum is σ = 1577160. Its totient is φ = 1042944.

The previous prime is 1308977. The next prime is 1309013. The reversal of 1308985 is 5898031.

It can be written as a sum of positive squares in 4 ways, for example, as 11664 + 1297321 = 108^2 + 1139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1308985 - 2³ = 1308977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1308985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1609 + ... + 2281.

It is an arithmetic number, because the mean of its divisors is an integer number (197145).

2^1308985 is an apocalyptic number.

It is an amenable number.

1308985 is a deficient number, since it is larger than the sum of its proper divisors (268175).

1308985 is an equidigital number, since it uses as much as digits as its factorization.

1308985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 1308985 is about 1144.1088234954. The cubic root of 1308985 is about 109.3901513704.

The spelling of 1308985 in words is "one million, three hundred eight thousand, nine hundred eighty-five".