1242503117 has 2 divisors, whose sum is σ = 1242503118. Its totient is φ = 1242503116.

The previous prime is 1242503077. The next prime is 1242503131. The reversal of 1242503117 is 7113052421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1159674916 + 82828201 = 34054^2 + 9101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242503117 - 2¹² = 1242499021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242503417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621251558 + 621251559.

It is an arithmetic number, because the mean of its divisors is an integer number (621251559).

Almost surely, 2^1242503117 is an apocalyptic number.

It is an amenable number.

1242503117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242503117 is an equidigital number, since it uses as much as digits as its factorization.

1242503117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1242503117 is about 35249.1576778793. The cubic root of 1242503117 is about 1075.0594860178.

Adding to 1242503117 its reverse (7113052421), we get a palindrome (8355555538).

The spelling of 1242503117 in words is "one billion, two hundred forty-two million, five hundred three thousand, one hundred seventeen".