1242313505 has 8 divisors (see below), whose sum is σ = 1578469032. Its totient is φ = 935388928.

The previous prime is 1242313487. The next prime is 1242313507. The reversal of 1242313505 is 5053132421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 338228881 + 904084624 = 18391^2 + 30068^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242313505 - 2⁸ = 1242313249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242313507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7307642 + ... + 7307811.

It is an arithmetic number, because the mean of its divisors is an integer number (197308629).

Almost surely, 2^1242313505 is an apocalyptic number.

It is an amenable number.

1242313505 is a deficient number, since it is larger than the sum of its proper divisors (336155527).

1242313505 is a wasteful number, since it uses less digits than its factorization.

1242313505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14615475.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1242313505 is about 35246.4679790756. The cubic root of 1242313505 is about 1075.0047968057.

Adding to 1242313505 its reverse (5053132421), we get a palindrome (6295445926).

The spelling of 1242313505 in words is "one billion, two hundred forty-two million, three hundred thirteen thousand, five hundred five".