1255500065 has 8 divisors (see below), whose sum is σ = 1595223720. Its totient is φ = 945317632.

The previous prime is 1255500053. The next prime is 1255500067. The reversal of 1255500065 is 5600055521.

It can be written as a sum of positive squares in 4 ways, for example, as 461218576 + 794281489 = 21476^2 + 28183^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1255500065 - 2¹⁶ = 1255434529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1255500067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7385210 + ... + 7385379.

It is an arithmetic number, because the mean of its divisors is an integer number (199402965).

Almost surely, 2^1255500065 is an apocalyptic number.

It is an amenable number.

1255500065 is a deficient number, since it is larger than the sum of its proper divisors (339723655).

1255500065 is a wasteful number, since it uses less digits than its factorization.

1255500065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14770611.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 1255500065 is about 35433.0363502763. The cubic root of 1255500065 is about 1078.7949708394.

Adding to 1255500065 its reverse (5600055521), we get a palindrome (6855555586).

The spelling of 1255500065 in words is "one billion, two hundred fifty-five million, five hundred thousand, sixty-five".