1255118505 has 16 divisors (see below), whose sum is σ = 2042228160. Its totient is φ = 658050368.

The previous prime is 1255118489. The next prime is 1255118507. The reversal of 1255118505 is 5058115521.

It is a cyclic number.

It is not a de Polignac number, because 1255118505 - 2⁴ = 1255118489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1255118507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 708222 + ... + 709991.

It is an arithmetic number, because the mean of its divisors is an integer number (127639260).

Almost surely, 2^1255118505 is an apocalyptic number.

1255118505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255118505 is a deficient number, since it is larger than the sum of its proper divisors (787109655).

1255118505 is a wasteful number, since it uses less digits than its factorization.

1255118505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418280.

The product of its (nonzero) digits is 10000, while the sum is 33.

The square root of 1255118505 is about 35427.6517003315. The cubic root of 1255118505 is about 1078.6856739606.

The spelling of 1255118505 in words is "one billion, two hundred fifty-five million, one hundred eighteen thousand, five hundred five".