1242555564 has 12 divisors (see below), whose sum is σ = 2899296344. Its totient is φ = 414185184.

The previous prime is 1242555541. The next prime is 1242555569. The reversal of 1242555564 is 4655552421.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1242555569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51773137 + ... + 51773160.

Almost surely, 2^1242555564 is an apocalyptic number.

It is an amenable number.

1242555564 is an abundant number, since it is smaller than the sum of its proper divisors (1656740780).

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

1242555564 is a wasteful number, since it uses less digits than its factorization.

1242555564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103546304 (or 103546302 counting only the distinct ones).

The product of its digits is 240000, while the sum is 39.

The square root of 1242555564 is about 35249.9016168840. The cubic root of 1242555564 is about 1075.0746121640.

The spelling of 1242555564 in words is "one billion, two hundred forty-two million, five hundred fifty-five thousand, five hundred sixty-four".