1255162005 has 24 divisors (see below), whose sum is σ = 2177766240. Its totient is φ = 668757600.

The previous prime is 1255161997. The next prime is 1255162019. The reversal of 1255162005 is 5002615521.

1255162005 is a `hidden beast` number, since 125 + 516 + 20 + 0 + 5 = 666.

It is not a de Polignac number, because 1255162005 - 2³ = 1255161997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255162005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34026 + ... + 60564.

It is an arithmetic number, because the mean of its divisors is an integer number (90740260).

Almost surely, 2^1255162005 is an apocalyptic number.

1255162005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255162005 is a deficient number, since it is larger than the sum of its proper divisors (922604235).

1255162005 is a wasteful number, since it uses less digits than its factorization.

1255162005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27601 (or 27598 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1255162005 is about 35428.2656222401. The cubic root of 1255162005 is about 1078.6981355421.

Adding to 1255162005 its reverse (5002615521), we get a palindrome (6257777526).

The spelling of 1255162005 in words is "one billion, two hundred fifty-five million, one hundred sixty-two thousand, five".