1277048385 has 12 divisors (see below), whose sum is σ = 2213550612. Its totient is φ = 681092448.

The previous prime is 1277048371. The next prime is 1277048401. The reversal of 1277048385 is 5838407721.

1277048385 is a `hidden beast` number, since 1 + 27 + 70 + 483 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 788991921 + 488056464 = 28089^2 + 22092^2 .

It is not a de Polignac number, because 1277048385 - 2⁹ = 1277047873 is a prime.

It is a super-2 number, since 2×1277048385² = 3261705155262216450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 28378853 = 1277048385 / (1 + 2 + 7 + 7 + 0 + 4 + 8 + 3 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1277048385.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14189382 + ... + 14189471.

It is an arithmetic number, because the mean of its divisors is an integer number (184462551).

Almost surely, 2^1277048385 is an apocalyptic number.

1277048385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1277048385 is a deficient number, since it is larger than the sum of its proper divisors (936502227).

1277048385 is a wasteful number, since it uses less digits than its factorization.

1277048385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28378864 (or 28378861 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 1277048385 is about 35735.8137587491. The cubic root of 1277048385 is about 1084.9318297617.

The spelling of 1277048385 in words is "one billion, two hundred seventy-seven million, forty-eight thousand, three hundred eighty-five".