1311055 has 8 divisors (see below), whose sum is σ = 1580832. Its totient is φ = 1043808.

The previous prime is 1311053. The next prime is 1311067. The reversal of 1311055 is 5501131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311055 - 2¹ = 1311053 is a prime.

It is a Duffinian number.

1311055 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817 + ... + 1813.

It is an arithmetic number, because the mean of its divisors is an integer number (197604).

2^1311055 is an apocalyptic number.

1311055 is a deficient number, since it is larger than the sum of its proper divisors (269777).

1311055 is an equidigital number, since it uses as much as digits as its factorization.

1311055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 1311055 is about 1145.0131003617. The cubic root of 1311055 is about 109.4477833924.

Adding to 1311055 its reverse (5501131), we get a palindrome (6812186).

The spelling of 1311055 in words is "one million, three hundred eleven thousand, fifty-five".