1242003656 has 16 divisors (see below), whose sum is σ = 2363515440. Its totient is φ = 611732880.

The previous prime is 1242003599. The next prime is 1242003683. The reversal of 1242003656 is 6563002421.

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, 1158050 + ... + 1159121.

It is an arithmetic number, because the mean of its divisors is an integer number (147719715).

Almost surely, 2^1242003656 is an apocalyptic number.

It is an amenable number.

1242003656 is a deficient number, since it is larger than the sum of its proper divisors (1121511784).

1242003656 is a wasteful number, since it uses less digits than its factorization.

1242003656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317244 (or 2317240 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1242003656 is about 35242.0722432720. The cubic root of 1242003656 is about 1074.9154160238.

The spelling of 1242003656 in words is "one billion, two hundred forty-two million, three thousand, six hundred fifty-six".