1273508871081 has 4 divisors (see below), whose sum is σ = 1698011828112. Its totient is φ = 849005914052.

The previous prime is 1273508871079. The next prime is 1273508871083. The reversal of 1273508871081 is 1801788053721.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (1273508871079) and next prime (1273508871083).

It is a cyclic number.

It is not a de Polignac number, because 1273508871081 - 2¹ = 1273508871079 is a prime.

It is a super-2 number, since 2×1273508871081² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1273508871083) 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, 212251478511 + ... + 212251478516.

It is an arithmetic number, because the mean of its divisors is an integer number (424502957028).

Almost surely, 2^{1273508871081} is an apocalyptic number.

It is an amenable number.

1273508871081 is a deficient number, since it is larger than the sum of its proper divisors (424502957031).

1273508871081 is an equidigital number, since it uses as much as digits as its factorization.

1273508871081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424502957030.

The product of its (nonzero) digits is 752640, while the sum is 51.

The spelling of 1273508871081 in words is "one trillion, two hundred seventy-three billion, five hundred eight million, eight hundred seventy-one thousand, eighty-one".