1255445065 has 16 divisors (see below), whose sum is σ = 1729348992. Its totient is φ = 857078784.

The previous prime is 1255445063. The next prime is 1255445089. The reversal of 1255445065 is 5605445521.

It is a cyclic number.

It is not a de Polignac number, because 1255445065 - 2¹ = 1255445063 is a prime.

It is a super-2 number, since 2×1255445065² = 3152284622465708450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255445063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71064 + ... + 86953.

It is an arithmetic number, because the mean of its divisors is an integer number (108084312).

Almost surely, 2^1255445065 is an apocalyptic number.

It is an amenable number.

1255445065 is a deficient number, since it is larger than the sum of its proper divisors (473903927).

1255445065 is a wasteful number, since it uses less digits than its factorization.

1255445065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158256.

The product of its (nonzero) digits is 120000, while the sum is 37.

The square root of 1255445065 is about 35432.2602299091. The cubic root of 1255445065 is about 1078.7792175972.

The spelling of 1255445065 in words is "one billion, two hundred fifty-five million, four hundred forty-five thousand, sixty-five".