1265625255 has 32 divisors (see below), whose sum is σ = 2147719680. Its totient is φ = 635057280.

The previous prime is 1265625247. The next prime is 1265625289. The reversal of 1265625255 is 5525265621.

It is not a de Polignac number, because 1265625255 - 2³ = 1265625247 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 9025 + ... + 51114.

It is an arithmetic number, because the mean of its divisors is an integer number (67116240).

Almost surely, 2^1265625255 is an apocalyptic number.

1265625255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1265625255 is a deficient number, since it is larger than the sum of its proper divisors (882094425).

1265625255 is a wasteful number, since it uses less digits than its factorization.

1265625255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60231.

The product of its digits is 180000, while the sum is 39.

The square root of 1265625255 is about 35575.6272608088. The cubic root of 1265625255 is about 1081.6872503772.

The spelling of 1265625255 in words is "one billion, two hundred sixty-five million, six hundred twenty-five thousand, two hundred fifty-five".