1242135152 has 40 divisors (see below), whose sum is σ = 2468703600. Its totient is φ = 605122560.

The previous prime is 1242135151. The next prime is 1242135233. The reversal of 1242135152 is 2515312421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242135151) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 306902 + ... + 310922.

It is an arithmetic number, because the mean of its divisors is an integer number (61717590).

Almost surely, 2^1242135152 is an apocalyptic number.

It is an amenable number.

1242135152 is a deficient number, since it is larger than the sum of its proper divisors (1226568448).

1242135152 is a wasteful number, since it uses less digits than its factorization.

1242135152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521 (or 4515 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 1242135152 is about 35243.9378049616. The cubic root of 1242135152 is about 1074.9533499136.

Adding to 1242135152 its reverse (2515312421), we get a palindrome (3757447573).

The spelling of 1242135152 in words is "one billion, two hundred forty-two million, one hundred thirty-five thousand, one hundred fifty-two".