1242268305 has 16 divisors (see below), whose sum is σ = 2021319360. Its totient is φ = 651313088.

The previous prime is 1242268289. The next prime is 1242268343. The reversal of 1242268305 is 5038622421.

It is a cyclic number.

It is not a de Polignac number, because 1242268305 - 2⁴ = 1242268289 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 700962 + ... + 702731.

It is an arithmetic number, because the mean of its divisors is an integer number (126332460).

Almost surely, 2^1242268305 is an apocalyptic number.

1242268305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242268305 is a deficient number, since it is larger than the sum of its proper divisors (779051055).

1242268305 is a wasteful number, since it uses less digits than its factorization.

1242268305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403760.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1242268305 is about 35245.8267742438. The cubic root of 1242268305 is about 1074.9917590859.

The spelling of 1242268305 in words is "one billion, two hundred forty-two million, two hundred sixty-eight thousand, three hundred five".