1265251264005 has 16 divisors (see below), whose sum is σ = 2024748273600. Its totient is φ = 674685257088.

The previous prime is 1265251263989. The next prime is 1265251264019. The reversal of 1265251264005 is 5004621525621.

It is not a de Polignac number, because 1265251264005 - 2⁴ = 1265251263989 is a prime.

It is a super-2 number, since 2×1265251264005² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7122907 + ... + 7298376.

It is an arithmetic number, because the mean of its divisors is an integer number (126546767100).

Almost surely, 2^{1265251264005} is an apocalyptic number.

1265251264005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1265251264005 is a deficient number, since it is larger than the sum of its proper divisors (759497009595).

1265251264005 is a wasteful number, since it uses less digits than its factorization.

1265251264005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14427140.

The product of its (nonzero) digits is 144000, while the sum is 39.

Adding to 1265251264005 its reverse (5004621525621), we get a palindrome (6269872789626).

The spelling of 1265251264005 in words is "one trillion, two hundred sixty-five billion, two hundred fifty-one million, two hundred sixty-four thousand, five".