1277486855 has 16 divisors (see below), whose sum is σ = 1550352960. Its totient is φ = 1010443008.

The previous prime is 1277486851. The next prime is 1277486893. The reversal of 1277486855 is 5586847721.

It is a cyclic number.

It is not a de Polignac number, because 1277486855 - 2² = 1277486851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1277486797 and 1277486806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277486851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396491 + ... + 399699.

It is an arithmetic number, because the mean of its divisors is an integer number (96897060).

Almost surely, 2^1277486855 is an apocalyptic number.

1277486855 is a deficient number, since it is larger than the sum of its proper divisors (272866105).

1277486855 is a wasteful number, since it uses less digits than its factorization.

1277486855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090.

The product of its digits is 3763200, while the sum is 53.

The square root of 1277486855 is about 35741.9481142257. The cubic root of 1277486855 is about 1085.0559847092.

The spelling of 1277486855 in words is "one billion, two hundred seventy-seven million, four hundred eighty-six thousand, eight hundred fifty-five".