1316985 has 16 divisors (see below), whose sum is σ = 2218560. Its totient is φ = 665280.

The previous prime is 1316983. The next prime is 1316989. The reversal of 1316985 is 5896131.

It is not a de Polignac number, because 1316985 - 2¹ = 1316983 is a prime.

1316985 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2026 + ... + 2595.

It is an arithmetic number, because the mean of its divisors is an integer number (138660).

2^1316985 is an apocalyptic number.

1316985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1316985 is a deficient number, since it is larger than the sum of its proper divisors (901575).

1316985 is a wasteful number, since it uses less digits than its factorization.

1316985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648.

The product of its digits is 6480, while the sum is 33.

The square root of 1316985 is about 1147.5996688741. The cubic root of 1316985 is about 109.6125487346.

The spelling of 1316985 in words is "one million, three hundred sixteen thousand, nine hundred eighty-five".