1271155 has 16 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 960480.

The previous prime is 1271147. The next prime is 1271161. The reversal of 1271155 is 5511721.

It is not a de Polignac number, because 1271155 - 2³ = 1271147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9076 + ... + 9214.

It is an arithmetic number, because the mean of its divisors is an integer number (100800).

2^1271155 is an apocalyptic number.

1271155 is a deficient number, since it is larger than the sum of its proper divisors (341645).

1271155 is a wasteful number, since it uses less digits than its factorization.

1271155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234.

The product of its digits is 350, while the sum is 22.

The square root of 1271155 is about 1127.4550988842. The cubic root of 1271155 is about 108.3260323811.

Adding to 1271155 its reverse (5511721), we get a palindrome (6782876).

The spelling of 1271155 in words is "one million, two hundred seventy-one thousand, one hundred fifty-five".