1265344545 has 16 divisors (see below), whose sum is σ = 2048945472. Its totient is φ = 666719040.

The previous prime is 1265344543. The next prime is 1265344579. The reversal of 1265344545 is 5454435621.

It is not a de Polignac number, because 1265344545 - 2¹ = 1265344543 is a prime.

It is a super-2 number, since 2×1265344545² = 3202193635122514050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1265344543) 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, 506926 + ... + 509415.

It is an arithmetic number, because the mean of its divisors is an integer number (128059092).

Almost surely, 2^1265344545 is an apocalyptic number.

1265344545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1265344545 is a deficient number, since it is larger than the sum of its proper divisors (783600927).

1265344545 is a wasteful number, since it uses less digits than its factorization.

1265344545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016432.

The product of its digits is 288000, while the sum is 39.

The square root of 1265344545 is about 35571.6817848130. The cubic root of 1265344545 is about 1081.6072733386.

The spelling of 1265344545 in words is "one billion, two hundred sixty-five million, three hundred forty-four thousand, five hundred forty-five".