1311355 has 4 divisors (see below), whose sum is σ = 1573632. Its totient is φ = 1049080.

The previous prime is 1311353. The next prime is 1311367. The reversal of 1311355 is 5531131.

1311355 = 465² + 466² + ... + 470².

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1311355 - 2¹ = 1311353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131131 + ... + 131140.

It is an arithmetic number, because the mean of its divisors is an integer number (393408).

2^1311355 is an apocalyptic number.

1311355 is a deficient number, since it is larger than the sum of its proper divisors (262277).

1311355 is an equidigital number, since it uses as much as digits as its factorization.

1311355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262276.

The product of its digits is 225, while the sum is 19.

The square root of 1311355 is about 1145.1440957364. The cubic root of 1311355 is about 109.4561308253.

Adding to 1311355 its reverse (5531131), we get a palindrome (6842486).

The spelling of 1311355 in words is "one million, three hundred eleven thousand, three hundred fifty-five".