1310985 has 48 divisors (see below), whose sum is σ = 2568384. Its totient is φ = 637632.

The previous prime is 1310963. The next prime is 1310987. The reversal of 1310985 is 5890131.

It is not a de Polignac number, because 1310985 - 2⁹ = 1310473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15754 + ... + 15836.

It is an arithmetic number, because the mean of its divisors is an integer number (53508).

2^1310985 is an apocalyptic number.

1310985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1310985 is a deficient number, since it is larger than the sum of its proper divisors (1257399).

1310985 is an equidigital number, since it uses as much as digits as its factorization.

1310985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1310985 is about 1144.9825326179. The cubic root of 1310985 is about 109.4458354749.

The spelling of 1310985 in words is "one million, three hundred ten thousand, nine hundred eighty-five".