1272967219 has 2 divisors, whose sum is σ = 1272967220. Its totient is φ = 1272967218.

The previous prime is 1272967183. The next prime is 1272967231. The reversal of 1272967219 is 9127692721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1272967219 - 2⁹ = 1272966707 is a prime.

It is a super-2 number, since 2×1272967219² = 3240891081297187922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1272967249) 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, 636483609 + 636483610.

It is an arithmetic number, because the mean of its divisors is an integer number (636483610).

Almost surely, 2^1272967219 is an apocalyptic number.

1272967219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272967219 is an equidigital number, since it uses as much as digits as its factorization.

1272967219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 1272967219 is about 35678.6661606064. Note that the first 3 decimals coincide. The cubic root of 1272967219 is about 1083.7748618439.

It can be divided in two parts, 12 and 72967219, that multiplied together give a triangular number (875606628 = T₄₁₈₄₇).

The spelling of 1272967219 in words is "one billion, two hundred seventy-two million, nine hundred sixty-seven thousand, two hundred nineteen".