1273171465801 has 3 divisors (see below), whose sum is σ = 1273172594151. Its totient is φ = 1273170337452.

The previous prime is 1273171465793. The next prime is 1273171465877. The reversal of 1273171465801 is 1085641713721.

The square root of 1273171465801 is 1128349.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 640478489401 + 632692976400 = 800299^2 + 795420^2 .

It is not a de Polignac number, because 1273171465801 - 2³ = 1273171465793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1273171468801) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 564175 + ... + 1692523.

It is an arithmetic number, because the mean of its divisors is an integer number (424390864717).

Almost surely, 2^{1273171465801} is an apocalyptic number.

1273171465801 is the 1128349-th square number.

1273171465801 is the 564175-th centered octagonal number.

It is an amenable number.

1273171465801 is a deficient number, since it is larger than the sum of its proper divisors (1128350).

1273171465801 is an frugal number, since it uses more digits than its factorization.

1273171465801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256698 (or 1128349 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 1273171465801 in words is "one trillion, two hundred seventy-three billion, one hundred seventy-one million, four hundred sixty-five thousand, eight hundred one".