1285717 has 2 divisors, whose sum is σ = 1285718. Its totient is φ = 1285716.

The previous prime is 1285703. The next prime is 1285741. The reversal of 1285717 is 7175821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 758641 + 527076 = 871^2 + 726^2 .

It is an emirp because it is prime and its reverse (7175821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1285717 - 2¹⁹ = 761429 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642858 + 642859.

It is an arithmetic number, because the mean of its divisors is an integer number (642859).

2^1285717 is an apocalyptic number.

It is an amenable number.

1285717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285717 is an equidigital number, since it uses as much as digits as its factorization.

1285717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 31.

The square root of 1285717 is about 1133.8946159145. The cubic root of 1285717 is about 108.7381138196.

It can be divided in two parts, 1285 and 717, that added together give a palindrome (2002).

The spelling of 1285717 in words is "one million, two hundred eighty-five thousand, seven hundred seventeen".