1242517 has 2 divisors, whose sum is σ = 1242518. Its totient is φ = 1242516.

The previous prime is 1242503. The next prime is 1242569. The reversal of 1242517 is 7152421.

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., 1240996 + 1521 = 1114^2 + 39^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621258 + 621259.

It is an arithmetic number, because the mean of its divisors is an integer number (621259).

2^1242517 is an apocalyptic number.

It is an amenable number.

1242517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242517 is an equidigital number, since it uses as much as digits as its factorization.

1242517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 22.

The square root of 1242517 is about 1114.6824659965. The cubic root of 1242517 is about 107.5063490031.

Adding to 1242517 its reverse (7152421), we get a palindrome (8394938).

The spelling of 1242517 in words is "one million, two hundred forty-two thousand, five hundred seventeen".