1255504005 has 96 divisors (see below), whose sum is σ = 2559997440. Its totient is φ = 557383680.

The previous prime is 1255503979. The next prime is 1255504007. The reversal of 1255504005 is 5004055521.

1255504005 is a `hidden beast` number, since 1 + 255 + 5 + 0 + 400 + 5 = 666.

It is not a de Polignac number, because 1255504005 - 2⁵ = 1255503973 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255504005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255504007) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1632261 + ... + 1633029.

It is an arithmetic number, because the mean of its divisors is an integer number (26666640).

Almost surely, 2^1255504005 is an apocalyptic number.

1255504005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255504005 is an abundant number, since it is smaller than the sum of its proper divisors (1304493435).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255504005 is a wasteful number, since it uses less digits than its factorization.

1255504005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 1255504005 is about 35433.0919480646. The cubic root of 1255504005 is about 1078.7960993267.

Adding to 1255504005 its reverse (5004055521), we get a palindrome (6259559526).

The spelling of 1255504005 in words is "one billion, two hundred fifty-five million, five hundred four thousand, five".