1280512634113 has 4 divisors (see below), whose sum is σ = 1281151933488. Its totient is φ = 1279873334740.

The previous prime is 1280512634099. The next prime is 1280512634129. The reversal of 1280512634113 is 3114362150821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1280512634113 - 2¹⁷ = 1280512503041 is a prime.

It is a super-2 number, since 2×1280512634113² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280512634173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319646683 + ... + 319650688.

It is an arithmetic number, because the mean of its divisors is an integer number (320287983372).

Almost surely, 2^{1280512634113} is an apocalyptic number.

It is an amenable number.

1280512634113 is a deficient number, since it is larger than the sum of its proper divisors (639299375).

1280512634113 is an equidigital number, since it uses as much as digits as its factorization.

1280512634113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639299374.

The product of its (nonzero) digits is 34560, while the sum is 37.

Adding to 1280512634113 its reverse (3114362150821), we get a palindrome (4394874784934).

The spelling of 1280512634113 in words is "one trillion, two hundred eighty billion, five hundred twelve million, six hundred thirty-four thousand, one hundred thirteen".