1272737117 has 2 divisors, whose sum is σ = 1272737118. Its totient is φ = 1272737116.

The previous prime is 1272737101. The next prime is 1272737119. The reversal of 1272737117 is 7117372721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1088076196 + 184660921 = 32986^2 + 13589^2 .

It is an emirp because it is prime and its reverse (7117372721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1272737117 - 2⁴ = 1272737101 is a prime.

Together with 1272737119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272737119) by changing a digit.

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 as a sum of consecutive naturals, namely, 636368558 + 636368559.

It is an arithmetic number, because the mean of its divisors is an integer number (636368559).

Almost surely, 2^1272737117 is an apocalyptic number.

It is an amenable number.

1272737117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272737117 is an equidigital number, since it uses as much as digits as its factorization.

1272737117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28812, while the sum is 38.

The square root of 1272737117 is about 35675.4413707805. The cubic root of 1272737117 is about 1083.7095567345.

The spelling of 1272737117 in words is "one billion, two hundred seventy-two million, seven hundred thirty-seven thousand, one hundred seventeen".