1255705065 has 48 divisors (see below), whose sum is σ = 2306937600. Its totient is φ = 648038880.

The previous prime is 1255705043. The next prime is 1255705067. The reversal of 1255705065 is 5605075521.

It is a happy number.

1255705065 is a `hidden beast` number, since 1 + 25 + 570 + 5 + 0 + 65 = 666.

It is not a de Polignac number, because 1255705065 - 2¹² = 1255700969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1255705067) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 124896 + ... + 134574.

It is an arithmetic number, because the mean of its divisors is an integer number (48061200).

Almost surely, 2^1255705065 is an apocalyptic number.

1255705065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255705065 is a deficient number, since it is larger than the sum of its proper divisors (1051232535).

1255705065 is an equidigital number, since it uses as much as digits as its factorization.

1255705065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9755 (or 9718 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The square root of 1255705065 is about 35435.9290127972. The cubic root of 1255705065 is about 1078.8536834165.

The spelling of 1255705065 in words is "one billion, two hundred fifty-five million, seven hundred five thousand, sixty-five".