1242503113 has 4 divisors (see below), whose sum is σ = 1242585028. Its totient is φ = 1242421200.

The previous prime is 1242503077. The next prime is 1242503117. The reversal of 1242503113 is 3113052421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 717543369 + 524959744 = 26787^2 + 22912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242503113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242503117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10806 + ... + 51007.

It is an arithmetic number, because the mean of its divisors is an integer number (310646257).

Almost surely, 2^1242503113 is an apocalyptic number.

It is an amenable number.

1242503113 is a deficient number, since it is larger than the sum of its proper divisors (81915).

1242503113 is an equidigital number, since it uses as much as digits as its factorization.

1242503113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81914.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1242503113 is about 35249.1576211404. The cubic root of 1242503113 is about 1075.0594848641.

Adding to 1242503113 its reverse (3113052421), we get a palindrome (4355555534).

The spelling of 1242503113 in words is "one billion, two hundred forty-two million, five hundred three thousand, one hundred thirteen".