1286713 has 4 divisors (see below), whose sum is σ = 1362420. Its totient is φ = 1211008.

The previous prime is 1286711. The next prime is 1286773. The reversal of 1286713 is 3176821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1192464 + 94249 = 1092^2 + 307^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286713 - 2¹ = 1286711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1286711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37828 + ... + 37861.

It is an arithmetic number, because the mean of its divisors is an integer number (340605).

2^1286713 is an apocalyptic number.

It is an amenable number.

1286713 is a deficient number, since it is larger than the sum of its proper divisors (75707).

1286713 is an equidigital number, since it uses as much as digits as its factorization.

1286713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75706.

The product of its digits is 2016, while the sum is 28.

The square root of 1286713 is about 1134.3337251444. Note that the first 3 decimals coincide. The cubic root of 1286713 is about 108.7661851103.

It can be divided in two parts, 12867 and 13, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 1286713 in words is "one million, two hundred eighty-six thousand, seven hundred thirteen".