1270442315261 has 12 divisors (see below), whose sum is σ = 1502088709500. Its totient is φ = 1071098904960.

The previous prime is 1270442315257. The next prime is 1270442315279. The reversal of 1270442315261 is 1625132440721.

It can be written as a sum of positive squares in 2 ways, for example, as 336609992761 + 933832322500 = 580181^2 + 966350^2 .

It is not a de Polignac number, because 1270442315261 - 2² = 1270442315257 is a prime.

It is a super-2 number, since 2×1270442315261² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1270442315201) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 212516636 + ... + 212522613.

It is an arithmetic number, because the mean of its divisors is an integer number (125174059125).

Almost surely, 2^{1270442315261} is an apocalyptic number.

It is an amenable number.

1270442315261 is a deficient number, since it is larger than the sum of its proper divisors (231646394239).

1270442315261 is an equidigital number, since it uses as much as digits as its factorization.

1270442315261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425039324 (or 425039317 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

Adding to 1270442315261 its reverse (1625132440721), we get a palindrome (2895574755982).

The spelling of 1270442315261 in words is "one trillion, two hundred seventy billion, four hundred forty-two million, three hundred fifteen thousand, two hundred sixty-one".