1265127637625 has 16 divisors (see below), whose sum is σ = 1578916919424. Its totient is φ = 1012077990000.

The previous prime is 1265127637597. The next prime is 1265127637633. The reversal of 1265127637625 is 5267367215621.

It is not a de Polignac number, because 1265127637625 - 2⁸ = 1265127637369 is a prime.

It is a super-3 number, since 3×1265127637625³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6667820 + ... + 6854930.

It is an arithmetic number, because the mean of its divisors is an integer number (98682307464).

Almost surely, 2^{1265127637625} is an apocalyptic number.

It is an amenable number.

1265127637625 is a deficient number, since it is larger than the sum of its proper divisors (313789281799).

1265127637625 is an equidigital number, since it uses as much as digits as its factorization.

1265127637625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241217 (or 241207 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 53.

The spelling of 1265127637625 in words is "one trillion, two hundred sixty-five billion, one hundred twenty-seven million, six hundred thirty-seven thousand, six hundred twenty-five".