1319985 has 12 divisors (see below), whose sum is σ = 2288052. Its totient is φ = 703968.

The previous prime is 1319963. The next prime is 1320019. The reversal of 1319985 is 5899131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 788544 + 531441 = 888^2 + 729^2 .

It is not a de Polignac number, because 1319985 - 2⁸ = 1319729 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14622 + ... + 14711.

It is an arithmetic number, because the mean of its divisors is an integer number (190671).

2^1319985 is an apocalyptic number.

1319985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1319985 is a deficient number, since it is larger than the sum of its proper divisors (968067).

1319985 is a wasteful number, since it uses less digits than its factorization.

1319985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29344 (or 29341 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1319985 is about 1148.9060013770. The cubic root of 1319985 is about 109.6957155314.

It can be divided in two parts, 1319 and 985, that added together give a square (2304 = 48²).

The spelling of 1319985 in words is "one million, three hundred nineteen thousand, nine hundred eighty-five".