1311255 has 32 divisors (see below), whose sum is σ = 2545920. Its totient is φ = 635040.

The previous prime is 1311251. The next prime is 1311259. The reversal of 1311255 is 5521131.

It is an interprime number because it is at equal distance from previous prime (1311251) and next prime (1311259).

It is not a de Polignac number, because 1311255 - 2² = 1311251 is a prime.

1311255 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1044 + ... + 1926.

It is an arithmetic number, because the mean of its divisors is an integer number (79560).

2^1311255 is an apocalyptic number.

1311255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1311255 is a deficient number, since it is larger than the sum of its proper divisors (1234665).

1311255 is a wasteful number, since it uses less digits than its factorization.

1311255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908 (or 902 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 1311255 is about 1145.1004322766. The cubic root of 1311255 is about 109.4533484892.

Adding to 1311255 its reverse (5521131), we get a palindrome (6832386).

The spelling of 1311255 in words is "one million, three hundred eleven thousand, two hundred fifty-five".