1242317 has 2 divisors, whose sum is σ = 1242318. Its totient is φ = 1242316.

The previous prime is 1242289. The next prime is 1242347. The reversal of 1242317 is 7132421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978121 + 264196 = 989^2 + 514^2 .

It is an emirp because it is prime and its reverse (7132421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242317 - 2⁸ = 1242061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621158 + 621159.

It is an arithmetic number, because the mean of its divisors is an integer number (621159).

2^1242317 is an apocalyptic number.

It is an amenable number.

1242317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242317 is an equidigital number, since it uses as much as digits as its factorization.

1242317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 20.

The square root of 1242317 is about 1114.5927507390. The cubic root of 1242317 is about 107.5005804908.

Adding to 1242317 its reverse (7132421), we get a palindrome (8374738).

The spelling of 1242317 in words is "one million, two hundred forty-two thousand, three hundred seventeen".