1272078887 has 2 divisors, whose sum is σ = 1272078888. Its totient is φ = 1272078886.

The previous prime is 1272078883. The next prime is 1272078931. The reversal of 1272078887 is 7888702721.

It is a weak prime.

It is an emirp because it is prime and its reverse (7888702721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1272078887 - 2² = 1272078883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272078883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636039443 + 636039444.

It is an arithmetic number, because the mean of its divisors is an integer number (636039444).

Almost surely, 2^1272078887 is an apocalyptic number.

1272078887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272078887 is an equidigital number, since it uses as much as digits as its factorization.

1272078887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 702464, while the sum is 50.

The square root of 1272078887 is about 35666.2149239305. The cubic root of 1272078887 is about 1083.5227014025.

The spelling of 1272078887 in words is "one billion, two hundred seventy-two million, seventy-eight thousand, eight hundred eighty-seven".