1285117 has 2 divisors, whose sum is σ = 1285118. Its totient is φ = 1285116.

The previous prime is 1285111. The next prime is 1285129. The reversal of 1285117 is 7115821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662596 + 622521 = 814^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285117 - 2¹¹ = 1283069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1285091 and 1285100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642558 + 642559.

It is an arithmetic number, because the mean of its divisors is an integer number (642559).

2^1285117 is an apocalyptic number.

It is an amenable number.

1285117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285117 is an equidigital number, since it uses as much as digits as its factorization.

1285117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 25.

The square root of 1285117 is about 1133.6300101885. The cubic root of 1285117 is about 108.7211964057.

The spelling of 1285117 in words is "one million, two hundred eighty-five thousand, one hundred seventeen".