1240717 has 2 divisors, whose sum is σ = 1240718. Its totient is φ = 1240716.

The previous prime is 1240709. The next prime is 1240739. The reversal of 1240717 is 7170421.

It is an a-pointer prime, because the next prime (1240739) can be obtained adding 1240717 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1028196 + 212521 = 1014^2 + 461^2 .

It is an emirp because it is prime and its reverse (7170421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240717 - 2³ = 1240709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620358 + 620359.

It is an arithmetic number, because the mean of its divisors is an integer number (620359).

2^1240717 is an apocalyptic number.

It is an amenable number.

1240717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240717 is an equidigital number, since it uses as much as digits as its factorization.

1240717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 1240717 is about 1113.8747685445. The cubic root of 1240717 is about 107.4544100897.

The spelling of 1240717 in words is "one million, two hundred forty thousand, seven hundred seventeen".