1255512501 has 8 divisors (see below), whose sum is σ = 1860018560. Its totient is φ = 837008316.

The previous prime is 1255512497. The next prime is 1255512539. The reversal of 1255512501 is 1052155521.

It is not a de Polignac number, because 1255512501 - 2² = 1255512497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 46500463 = 1255512501 / (1 + 2 + 5 + 5 + 5 + 1 + 2 + 5 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255512541) 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 7 ways as a sum of consecutive naturals, for example, 23250205 + ... + 23250258.

It is an arithmetic number, because the mean of its divisors is an integer number (232502320).

Almost surely, 2^1255512501 is an apocalyptic number.

It is an amenable number.

1255512501 is a deficient number, since it is larger than the sum of its proper divisors (604506059).

1255512501 is an equidigital number, since it uses as much as digits as its factorization.

1255512501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46500472 (or 46500466 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 1255512501 is about 35433.2118357904. The cubic root of 1255512501 is about 1078.7985327269.

The spelling of 1255512501 in words is "one billion, two hundred fifty-five million, five hundred twelve thousand, five hundred one".