1265517254161 has 16 divisors (see below), whose sum is σ = 1312437772800. Its totient is φ = 1218984480000.

The previous prime is 1265517254137. The next prime is 1265517254167. The reversal of 1265517254161 is 1614527155621.

It is not a de Polignac number, because 1265517254161 - 2⁵ = 1265517254129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265517254167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11531295 + ... + 11640523.

It is an arithmetic number, because the mean of its divisors is an integer number (82027360800).

Almost surely, 2^{1265517254161} is an apocalyptic number.

It is an amenable number.

1265517254161 is a deficient number, since it is larger than the sum of its proper divisors (46920518639).

1265517254161 is a wasteful number, since it uses less digits than its factorization.

1265517254161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111000.

The product of its digits is 504000, while the sum is 46.

The spelling of 1265517254161 in words is "one trillion, two hundred sixty-five billion, five hundred seventeen million, two hundred fifty-four thousand, one hundred sixty-one".