1311081 has 8 divisors (see below), whose sum is σ = 1765824. Its totient is φ = 865200.

The previous prime is 1311067. The next prime is 1311097. The reversal of 1311081 is 1801131.

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

It is not a de Polignac number, because 1311081 - 2¹⁷ = 1180009 is a prime.

It is a super-3 number, since 3×1311081³ = 6760982718023833323, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1311081.

It is not an unprimeable number, because it can be changed into a prime (1311001) 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 7 ways as a sum of consecutive naturals, for example, 1861 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (220728).

2^1311081 is an apocalyptic number.

It is an amenable number.

1311081 is a deficient number, since it is larger than the sum of its proper divisors (454743).

1311081 is a wasteful number, since it uses less digits than its factorization.

1311081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 1311081 is about 1145.0244538873. The cubic root of 1311081 is about 109.4485068870.

The spelling of 1311081 in words is "one million, three hundred eleven thousand, eighty-one".