1311085 has 4 divisors (see below), whose sum is σ = 1573308. Its totient is φ = 1048864.

The previous prime is 1311067. The next prime is 1311097. The reversal of 1311085 is 5801131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 925444 + 385641 = 962^2 + 621^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311085 - 2⁵ = 1311053 is a prime.

It is a Duffinian number.

1311085 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131104 + ... + 131113.

It is an arithmetic number, because the mean of its divisors is an integer number (393327).

2^1311085 is an apocalyptic number.

It is an amenable number.

1311085 is a deficient number, since it is larger than the sum of its proper divisors (262223).

1311085 is an equidigital number, since it uses as much as digits as its factorization.

1311085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262222.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1311085 is about 1145.0262005736. The cubic root of 1311085 is about 109.4486181930.

The spelling of 1311085 in words is "one million, three hundred eleven thousand, eighty-five".