1255695128 has 16 divisors (see below), whose sum is σ = 2435616000. Its totient is φ = 606197536.

The previous prime is 1255695121. The next prime is 1255695169. The reversal of 1255695128 is 8215965521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255695121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2706008 + ... + 2706471.

It is an arithmetic number, because the mean of its divisors is an integer number (152226000).

Almost surely, 2^1255695128 is an apocalyptic number.

It is an amenable number.

1255695128 is a deficient number, since it is larger than the sum of its proper divisors (1179920872).

1255695128 is a wasteful number, since it uses less digits than its factorization.

1255695128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5412514 (or 5412510 counting only the distinct ones).

The product of its digits is 216000, while the sum is 44.

The square root of 1255695128 is about 35435.7888017185. The cubic root of 1255695128 is about 1078.8508375791.

The spelling of 1255695128 in words is "one billion, two hundred fifty-five million, six hundred ninety-five thousand, one hundred twenty-eight".