1272351659209 has 8 divisors (see below), whose sum is σ = 1274189482440. Its totient is φ = 1270515048576.

The previous prime is 1272351659207. The next prime is 1272351659231. The reversal of 1272351659209 is 9029561532721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60403875984 + 1211947783225 = 245772^2 + 1100885^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1272351659209 - 2¹ = 1272351659207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272351659207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1807509 + ... + 2410765.

It is an arithmetic number, because the mean of its divisors is an integer number (159273685305).

Almost surely, 2^{1272351659209} is an apocalyptic number.

It is an amenable number.

1272351659209 is a deficient number, since it is larger than the sum of its proper divisors (1837823231).

1272351659209 is a wasteful number, since it uses less digits than its factorization.

1272351659209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606299.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 1272351659209 in words is "one trillion, two hundred seventy-two billion, three hundred fifty-one million, six hundred fifty-nine thousand, two hundred nine".