1242042102 has 120 divisors (see below), whose sum is σ = 3250952640. Its totient is φ = 342286560.

The previous prime is 1242042079. The next prime is 1242042127. The reversal of 1242042102 is 2012402421.

1242042102 is a `hidden beast` number, since 1 + 242 + 0 + 421 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 59 ways as a sum of consecutive naturals, for example, 1252827 + ... + 1253817.

It is an arithmetic number, because the mean of its divisors is an integer number (27091272).

Almost surely, 2^1242042102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242042102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1625476320).

1242042102 is an abundant number, since it is smaller than the sum of its proper divisors (2008910538).

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

1242042102 is an equidigital number, since it uses as much as digits as its factorization.

1242042102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1032 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1242042102 is about 35242.6176950578. The cubic root of 1242042102 is about 1074.9265071805.

Adding to 1242042102 its reverse (2012402421), we get a palindrome (3254444523).

The spelling of 1242042102 in words is "one billion, two hundred forty-two million, forty-two thousand, one hundred two".