1311139 has 8 divisors (see below), whose sum is σ = 1359792. Its totient is φ = 1263360.

The previous prime is 1311131. The next prime is 1311143. The reversal of 1311139 is 9311131.

It is a happy number.

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 1311139 - 2³ = 1311131 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 (1311131) 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, 4492 + ... + 4774.

It is an arithmetic number, because the mean of its divisors is an integer number (169974).

2^1311139 is an apocalyptic number.

1311139 is a deficient number, since it is larger than the sum of its proper divisors (48653).

1311139 is a wasteful number, since it uses less digits than its factorization.

1311139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437.

The product of its digits is 81, while the sum is 19.

The square root of 1311139 is about 1145.0497805772. The cubic root of 1311139 is about 109.4501208020.

The spelling of 1311139 in words is "one million, three hundred eleven thousand, one hundred thirty-nine".