1297779055 has 8 divisors (see below), whose sum is σ = 1557532800. Its totient is φ = 1038091296.

The previous prime is 1297779047. The next prime is 1297779073. The reversal of 1297779055 is 5509777921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1297779055 - 2³ = 1297779047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1297778993 and 1297779011.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 54781 + ... + 74809.

It is an arithmetic number, because the mean of its divisors is an integer number (194691600).

Almost surely, 2^1297779055 is an apocalyptic number.

1297779055 is a deficient number, since it is larger than the sum of its proper divisors (259753745).

1297779055 is a wasteful number, since it uses less digits than its factorization.

1297779055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32993.

The product of its (nonzero) digits is 1389150, while the sum is 52.

The square root of 1297779055 is about 36024.7006233223. The cubic root of 1297779055 is about 1090.7710099233.

The spelling of 1297779055 in words is "one billion, two hundred ninety-seven million, seven hundred seventy-nine thousand, fifty-five".