1242561102 has 16 divisors (see below), whose sum is σ = 2486641872. Its totient is φ = 413933760.

The previous prime is 1242561101. The next prime is 1242561109. The reversal of 1242561102 is 2011652421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242561101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52549 + ... + 72432.

It is an arithmetic number, because the mean of its divisors is an integer number (155415117).

Almost surely, 2^1242561102 is an apocalyptic number.

1242561102 is an abundant number, since it is smaller than the sum of its proper divisors (1244080770).

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

1242561102 is a wasteful number, since it uses less digits than its factorization.

1242561102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126643.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1242561102 is about 35249.9801702072. The cubic root of 1242561102 is about 1075.0762093439.

The spelling of 1242561102 in words is "one billion, two hundred forty-two million, five hundred sixty-one thousand, one hundred two".