1275661705001 has 4 divisors (see below), whose sum is σ = 1291809321600. Its totient is φ = 1259514088404.

The previous prime is 1275661704979. The next prime is 1275661705009. The reversal of 1275661705001 is 1005071665721.

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 1275661705001 - 2¹⁸ = 1275661442857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1275661705001.

It is not an unprimeable number, because it can be changed into a prime (1275661705009) 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, 8073808181 + ... + 8073808338.

It is an arithmetic number, because the mean of its divisors is an integer number (322952330400).

Almost surely, 2^{1275661705001} is an apocalyptic number.

It is an amenable number.

1275661705001 is a deficient number, since it is larger than the sum of its proper divisors (16147616599).

1275661705001 is an equidigital number, since it uses as much as digits as its factorization.

1275661705001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16147616598.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 1275661705001 in words is "one trillion, two hundred seventy-five billion, six hundred sixty-one million, seven hundred five thousand, one".