1271655 has 48 divisors (see below), whose sum is σ = 2755584. Its totient is φ = 527040.

The previous prime is 1271609. The next prime is 1271657. The reversal of 1271655 is 5561721.

1271655 is a `hidden beast` number, since 1 + 2 + 7 + 1 + 655 = 666.

It is not a de Polignac number, because 1271655 - 2⁸ = 1271399 is a prime.

1271655 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271657) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 3282 + ... + 3648.

It is an arithmetic number, because the mean of its divisors is an integer number (57408).

2^1271655 is an apocalyptic number.

1271655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1271655 is an abundant number, since it is smaller than the sum of its proper divisors (1483929).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271655 is a wasteful number, since it uses less digits than its factorization.

1271655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 393 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 1271655 is about 1127.6768154041. The cubic root of 1271655 is about 108.3402336170.

The spelling of 1271655 in words is "one million, two hundred seventy-one thousand, six hundred fifty-five".