1255984855 has 8 divisors (see below), whose sum is σ = 1507403664. Its totient is φ = 1004640000.

The previous prime is 1255984853. The next prime is 1255984859. The reversal of 1255984855 is 5584895521.

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

It is not a de Polignac number, because 1255984855 - 2¹ = 1255984853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255984853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30855 + ... + 58855.

It is an arithmetic number, because the mean of its divisors is an integer number (188425458).

Almost surely, 2^1255984855 is an apocalyptic number.

1255984855 is a deficient number, since it is larger than the sum of its proper divisors (251418809).

1255984855 is an equidigital number, since it uses as much as digits as its factorization.

1255984855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36977.

The product of its digits is 2880000, while the sum is 52.

The square root of 1255984855 is about 35439.8766222457. The cubic root of 1255984855 is about 1078.9338057489.

The spelling of 1255984855 in words is "one billion, two hundred fifty-five million, nine hundred eighty-four thousand, eight hundred fifty-five".