1299270275173 has 6 divisors (see below), whose sum is σ = 1399218568454. Its totient is φ = 1199322614184.

The previous prime is 1299270275111. The next prime is 1299270275209. The reversal of 1299270275173 is 3715720729921.

It can be written as a sum of positive squares in only one way, i.e., 899494805889 + 399775469284 = 948417^2 + 632278^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1299270275173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299270270173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3951738 + ... + 4267876.

Almost surely, 2^{1299270275173} is an apocalyptic number.

1299270275173 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1299270275173 is a deficient number, since it is larger than the sum of its proper divisors (99948293281).

1299270275173 is an frugal number, since it uses more digits than its factorization.

1299270275173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632291 (or 316152 counting only the distinct ones).

The product of its (nonzero) digits is 3333960, while the sum is 55.

The spelling of 1299270275173 in words is "one trillion, two hundred ninety-nine billion, two hundred seventy million, two hundred seventy-five thousand, one hundred seventy-three".