1270861279 has 2 divisors, whose sum is σ = 1270861280. Its totient is φ = 1270861278.

The previous prime is 1270861271. The next prime is 1270861283. The reversal of 1270861279 is 9721680721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1270861279 - 2³ = 1270861271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1270861271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635430639 + 635430640.

It is an arithmetic number, because the mean of its divisors is an integer number (635430640).

Almost surely, 2^1270861279 is an apocalyptic number.

1270861279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270861279 is an equidigital number, since it uses as much as digits as its factorization.

1270861279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 1270861279 is about 35649.1413501083. The cubic root of 1270861279 is about 1083.1768824222.

The spelling of 1270861279 in words is "one billion, two hundred seventy million, eight hundred sixty-one thousand, two hundred seventy-nine".