1242155052 has 36 divisors (see below), whose sum is σ = 3141168576. Its totient is φ = 413883360.

The previous prime is 1242155021. The next prime is 1242155053. The reversal of 1242155052 is 2505512421.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1242155053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109093 + ... + 119939.

Almost surely, 2^1242155052 is an apocalyptic number.

1242155052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1242155052 is an abundant number, since it is smaller than the sum of its proper divisors (1899013524).

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

1242155052 is a wasteful number, since it uses less digits than its factorization.

1242155052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14038 (or 14033 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1242155052 is about 35244.2201218867. The cubic root of 1242155052 is about 1074.9590904208.

Adding to 1242155052 its reverse (2505512421), we get a palindrome (3747667473).

The spelling of 1242155052 in words is "one billion, two hundred forty-two million, one hundred fifty-five thousand, fifty-two".