1242885728 has 48 divisors (see below), whose sum is σ = 2886718464. Its totient is φ = 515479680.

The previous prime is 1242885713. The next prime is 1242885733. The reversal of 1242885728 is 8275882421.

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, 82550 + ... + 96437.

It is an arithmetic number, because the mean of its divisors is an integer number (60139968).

Almost surely, 2^1242885728 is an apocalyptic number.

It is an amenable number.

1242885728 is an abundant number, since it is smaller than the sum of its proper divisors (1643832736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242885728 is a wasteful number, since it uses less digits than its factorization.

1242885728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179035 (or 179027 counting only the distinct ones).

The product of its digits is 573440, while the sum is 47.

The square root of 1242885728 is about 35254.5844962042. The cubic root of 1242885728 is about 1075.1698244053.

The spelling of 1242885728 in words is "one billion, two hundred forty-two million, eight hundred eighty-five thousand, seven hundred twenty-eight".