1265127750265 has 16 divisors (see below), whose sum is σ = 1527766494336. Its totient is φ = 1005708614400.

The previous prime is 1265127750233. The next prime is 1265127750269. The reversal of 1265127750265 is 5620577215621.

It is not a de Polignac number, because 1265127750265 - 2⁵ = 1265127750233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265127750269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284512 + ... + 1615921.

It is an arithmetic number, because the mean of its divisors is an integer number (95485405896).

Almost surely, 2^{1265127750265} is an apocalyptic number.

It is an amenable number.

1265127750265 is a deficient number, since it is larger than the sum of its proper divisors (262638744071).

1265127750265 is a wasteful number, since it uses less digits than its factorization.

1265127750265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901280.

The product of its (nonzero) digits is 1764000, while the sum is 49.

The spelling of 1265127750265 in words is "one trillion, two hundred sixty-five billion, one hundred twenty-seven million, seven hundred fifty thousand, two hundred sixty-five".