1311129 has 6 divisors (see below), whose sum is σ = 1893866. Its totient is φ = 874080.

The previous prime is 1311127. The next prime is 1311131. The reversal of 1311129 is 9211131.

It is an interprime number because it is at equal distance from previous prime (1311127) and next prime (1311131).

It can be written as a sum of positive squares in only one way, i.e., 725904 + 585225 = 852^2 + 765^2 .

It is not a de Polignac number, because 1311129 - 2¹ = 1311127 is a prime.

It is a Duffinian number.

1311129 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1311127) 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 5 ways as a sum of consecutive naturals, for example, 72832 + ... + 72849.

2^1311129 is an apocalyptic number.

It is an amenable number.

1311129 is a deficient number, since it is larger than the sum of its proper divisors (582737).

1311129 is a wasteful number, since it uses less digits than its factorization.

1311129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145687 (or 145684 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

The square root of 1311129 is about 1145.0454139465. The cubic root of 1311129 is about 109.4498425442.

The spelling of 1311129 in words is "one million, three hundred eleven thousand, one hundred twenty-nine".