1313986 has 4 divisors (see below), whose sum is σ = 1970982. Its totient is φ = 656992.

The previous prime is 1313959. The next prime is 1313987. The reversal of 1313986 is 6893131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6893131 = 7 ⋅984733.

It can be written as a sum of positive squares in only one way, i.e., 1038361 + 275625 = 1019^2 + 525^2 .

It is not an unprimeable number, because it can be changed into a prime (1313987) by changing a digit.

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 as a sum of consecutive naturals, namely, 328495 + ... + 328498.

2^1313986 is an apocalyptic number.

1313986 is a deficient number, since it is larger than the sum of its proper divisors (656996).

1313986 is an equidigital number, since it uses as much as digits as its factorization.

1313986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656995.

The product of its digits is 3888, while the sum is 31.

The square root of 1313986 is about 1146.2922838439. The cubic root of 1313986 is about 109.5292833283.

It can be divided in two parts, 13139 and 86, that added together give a square (13225 = 115²).

The spelling of 1313986 in words is "one million, three hundred thirteen thousand, nine hundred eighty-six".