1272273479 has 2 divisors, whose sum is σ = 1272273480. Its totient is φ = 1272273478.

The previous prime is 1272273461. The next prime is 1272273481. The reversal of 1272273479 is 9743722721.

It is a strong prime.

It is an emirp because it is prime and its reverse (9743722721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272273479 is a prime.

Together with 1272273481, 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 (1272273679) 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 as a sum of consecutive naturals, namely, 636136739 + 636136740.

It is an arithmetic number, because the mean of its divisors is an integer number (636136740).

Almost surely, 2^1272273479 is an apocalyptic number.

1272273479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272273479 is an equidigital number, since it uses as much as digits as its factorization.

1272273479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 44.

The square root of 1272273479 is about 35668.9427793984. The cubic root of 1272273479 is about 1083.5779480023.

The spelling of 1272273479 in words is "one billion, two hundred seventy-two million, two hundred seventy-three thousand, four hundred seventy-nine".