1316865 has 32 divisors (see below), whose sum is σ = 2405376. Its totient is φ = 608960.

The previous prime is 1316831. The next prime is 1316869. The reversal of 1316865 is 5686131.

It is not a de Polignac number, because 1316865 - 2⁶ = 1316801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1316869) 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 31 ways as a sum of consecutive naturals, for example, 3622 + ... + 3968.

It is an arithmetic number, because the mean of its divisors is an integer number (75168).

It is a Proth number, since it is equal to 643 ⋅ 2¹¹ + 1 and 643 < 2¹¹.

2^1316865 is an apocalyptic number.

1316865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1316865 is a deficient number, since it is larger than the sum of its proper divisors (1088511).

1316865 is a wasteful number, since it uses less digits than its factorization.

1316865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its digits is 4320, while the sum is 30.

The square root of 1316865 is about 1147.5473846426. The cubic root of 1316865 is about 109.6092194369.

It can be divided in two parts, 131 and 6865, that added together give a palindrome (6996).

The spelling of 1316865 in words is "one million, three hundred sixteen thousand, eight hundred sixty-five".