1242686308 has 12 divisors (see below), whose sum is σ = 2249690940. Its totient is φ = 599917472.

The previous prime is 1242686299. The next prime is 1242686321. The reversal of 1242686308 is 8036862421.

It can be written as a sum of positive squares in 2 ways, for example, as 382906624 + 859779684 = 19568^2 + 29322^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5356291 + ... + 5356522.

It is an arithmetic number, because the mean of its divisors is an integer number (187474245).

Almost surely, 2^1242686308 is an apocalyptic number.

It is an amenable number.

1242686308 is a deficient number, since it is larger than the sum of its proper divisors (1007004632).

1242686308 is a wasteful number, since it uses less digits than its factorization.

1242686308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10712846 (or 10712844 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 1242686308 is about 35251.7560981010. The cubic root of 1242686308 is about 1075.1123179561.

The spelling of 1242686308 in words is "one billion, two hundred forty-two million, six hundred eighty-six thousand, three hundred eight".