1255734865 has 32 divisors (see below), whose sum is σ = 1880792064. Its totient is φ = 781928640.

The previous prime is 1255734863. The next prime is 1255734877. The reversal of 1255734865 is 5684375521.

It is not a de Polignac number, because 1255734865 - 2¹ = 1255734863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255734863) 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 31 ways as a sum of consecutive naturals, for example, 671662 + ... + 673528.

It is an arithmetic number, because the mean of its divisors is an integer number (58774752).

Almost surely, 2^1255734865 is an apocalyptic number.

It is an amenable number.

1255734865 is a deficient number, since it is larger than the sum of its proper divisors (625057199).

1255734865 is a wasteful number, since it uses less digits than its factorization.

1255734865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637.

The product of its digits is 1008000, while the sum is 46.

The square root of 1255734865 is about 35436.3494874966. The cubic root of 1255734865 is about 1078.8622176885.

The spelling of 1255734865 in words is "one billion, two hundred fifty-five million, seven hundred thirty-four thousand, eight hundred sixty-five".