1242808885 has 8 divisors (see below), whose sum is σ = 1579098456. Its totient is φ = 935761920.

The previous prime is 1242808859. The next prime is 1242808927. The reversal of 1242808885 is 5888082421.

It can be written as a sum of positive squares in 4 ways, for example, as 398441521 + 844367364 = 19961^2 + 29058^2 .

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

It is not a de Polignac number, because 1242808885 - 2¹³ = 1242800693 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 7310556 + ... + 7310725.

It is an arithmetic number, because the mean of its divisors is an integer number (197387307).

Almost surely, 2^1242808885 is an apocalyptic number.

It is an amenable number.

1242808885 is a deficient number, since it is larger than the sum of its proper divisors (336289571).

1242808885 is a wasteful number, since it uses less digits than its factorization.

1242808885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14621303.

The product of its (nonzero) digits is 327680, while the sum is 46.

The square root of 1242808885 is about 35253.4946494670. The cubic root of 1242808885 is about 1075.1476660320.

The spelling of 1242808885 in words is "one billion, two hundred forty-two million, eight hundred eight thousand, eight hundred eighty-five".