1255710265 has 4 divisors (see below), whose sum is σ = 1506852324. Its totient is φ = 1004568208.

The previous prime is 1255710263. The next prime is 1255710289. The reversal of 1255710265 is 5620175521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 452497984 + 803212281 = 21272^2 + 28341^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255710265 - 2¹ = 1255710263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255710265.

It is not an unprimeable number, because it can be changed into a prime (1255710263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125571022 + ... + 125571031.

It is an arithmetic number, because the mean of its divisors is an integer number (376713081).

Almost surely, 2^1255710265 is an apocalyptic number.

It is an amenable number.

1255710265 is a deficient number, since it is larger than the sum of its proper divisors (251142059).

1255710265 is an equidigital number, since it uses as much as digits as its factorization.

1255710265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251142058.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 1255710265 is about 35436.0023845806. The cubic root of 1255710265 is about 1078.8551726281.

Adding to 1255710265 its reverse (5620175521), we get a palindrome (6875885786).

It can be divided in two parts, 12557 and 10265, that added together give a palindrome (22822).

The spelling of 1255710265 in words is "one billion, two hundred fifty-five million, seven hundred ten thousand, two hundred sixty-five".