1281314025155 has 8 divisors (see below), whose sum is σ = 1573334431152. Its totient is φ = 1001212819488.

The previous prime is 1281314025151. The next prime is 1281314025157. The reversal of 1281314025155 is 5515204131821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1281314025155 - 2² = 1281314025151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281314025151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2979799844 + ... + 2979800273.

It is an arithmetic number, because the mean of its divisors is an integer number (196666803894).

Almost surely, 2^{1281314025155} is an apocalyptic number.

1281314025155 is a deficient number, since it is larger than the sum of its proper divisors (292020405997).

1281314025155 is an equidigital number, since it uses as much as digits as its factorization.

1281314025155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959600165.

The product of its (nonzero) digits is 48000, while the sum is 38.

Adding to 1281314025155 its reverse (5515204131821), we get a palindrome (6796518156976).

The spelling of 1281314025155 in words is "one trillion, two hundred eighty-one billion, three hundred fourteen million, twenty-five thousand, one hundred fifty-five".