1275166249045 has 8 divisors (see below), whose sum is σ = 1647907152696. Its totient is φ = 941661230016.

The previous prime is 1275166248997. The next prime is 1275166249051. The reversal of 1275166249045 is 5409426615721.

It can be written as a sum of positive squares in 4 ways, for example, as 21933017604 + 1253233231441 = 148098^2 + 1119479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1275166249045 - 2¹⁹ = 1275165724757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1275166248983 and 1275166249001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9808971082 + ... + 9808971211.

It is an arithmetic number, because the mean of its divisors is an integer number (205988394087).

Almost surely, 2^{1275166249045} is an apocalyptic number.

It is an amenable number.

1275166249045 is a deficient number, since it is larger than the sum of its proper divisors (372740903651).

1275166249045 is a wasteful number, since it uses less digits than its factorization.

1275166249045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19617942311.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 1275166249045 in words is "one trillion, two hundred seventy-five billion, one hundred sixty-six million, two hundred forty-nine thousand, forty-five".