1242134555 has 8 divisors (see below), whose sum is σ = 1492408800. Its totient is φ = 992476096.

The previous prime is 1242134513. The next prime is 1242134599. The reversal of 1242134555 is 5554312421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242134555 - 2¹⁶ = 1242069019 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 149495 + ... + 157584.

It is an arithmetic number, because the mean of its divisors is an integer number (186551100).

Almost surely, 2^1242134555 is an apocalyptic number.

1242134555 is a deficient number, since it is larger than the sum of its proper divisors (250274245).

1242134555 is an equidigital number, since it uses as much as digits as its factorization.

1242134555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307893.

The product of its digits is 24000, while the sum is 32.

The square root of 1242134555 is about 35243.9293354189. The cubic root of 1242134555 is about 1074.9531776974.

Adding to 1242134555 its reverse (5554312421), we get a palindrome (6796446976).

The spelling of 1242134555 in words is "one billion, two hundred forty-two million, one hundred thirty-four thousand, five hundred fifty-five".