1311087 has 8 divisors (see below), whose sum is σ = 1765504. Its totient is φ = 865368.

The previous prime is 1311067. The next prime is 1311097. The reversal of 1311087 is 7801131.

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

It is not a de Polignac number, because 1311087 - 2¹⁰ = 1310063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311047) 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, 1813 + ... + 2430.

It is an arithmetic number, because the mean of its divisors is an integer number (220688).

2^1311087 is an apocalyptic number.

1311087 is a deficient number, since it is larger than the sum of its proper divisors (454417).

1311087 is a wasteful number, since it uses less digits than its factorization.

1311087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4349.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 1311087 is about 1145.0270739157. The cubic root of 1311087 is about 109.4486738459.

The spelling of 1311087 in words is "one million, three hundred eleven thousand, eighty-seven".