1238144555 has 8 divisors (see below), whose sum is σ = 1495746000. Its totient is φ = 983867296.

The previous prime is 1238144549. The next prime is 1238144591. The reversal of 1238144555 is 5554418321.

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 1238144555 - 2⁴ = 1238144539 is a prime.

It is a super-2 number, since 2×1238144555² = 3066003878152296050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830225 + ... + 831714.

It is an arithmetic number, because the mean of its divisors is an integer number (186968250).

Almost surely, 2^1238144555 is an apocalyptic number.

1238144555 is a deficient number, since it is larger than the sum of its proper divisors (257601445).

1238144555 is a wasteful number, since it uses less digits than its factorization.

1238144555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662093.

The product of its digits is 96000, while the sum is 38.

The square root of 1238144555 is about 35187.2783119127. The cubic root of 1238144555 is about 1073.8009504460.

The spelling of 1238144555 in words is "one billion, two hundred thirty-eight million, one hundred forty-four thousand, five hundred fifty-five".