1311254025601 has 8 divisors (see below), whose sum is σ = 1412819857064. Its totient is φ = 1209788213760.

The previous prime is 1311254025583. The next prime is 1311254025607. The reversal of 1311254025601 is 1065204521131.

It can be written as a sum of positive squares in 4 ways, for example, as 228124685376 + 1083129340225 = 477624^2 + 1040735^2 .

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 1311254025601 - 2²¹ = 1311251928449 is a prime.

It is a super-2 number, since 2×1311254025601² (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 (1311254025607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24977670 + ... + 25030111.

It is an arithmetic number, because the mean of its divisors is an integer number (176602482133).

Almost surely, 2^{1311254025601} is an apocalyptic number.

It is an amenable number.

1311254025601 is a deficient number, since it is larger than the sum of its proper divisors (101565831463).

1311254025601 is a wasteful number, since it uses less digits than its factorization.

1311254025601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50009811.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 1311254025601 its reverse (1065204521131), we get a palindrome (2376458546732).

The spelling of 1311254025601 in words is "one trillion, three hundred eleven billion, two hundred fifty-four million, twenty-five thousand, six hundred one".