1131959 has 2 divisors, whose sum is σ = 1131960. Its totient is φ = 1131958.

The previous prime is 1131943. The next prime is 1131961. The reversal of 1131959 is 9591311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131959 - 2⁴ = 1131943 is a prime.

Together with 1131961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565979 + 565980.

It is an arithmetic number, because the mean of its divisors is an integer number (565980).

2^1131959 is an apocalyptic number.

1131959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131959 is an equidigital number, since it uses as much as digits as its factorization.

1131959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1215, while the sum is 29.

The square root of 1131959 is about 1063.9356183529. The cubic root of 1131959 is about 104.2181994262.

The spelling of 1131959 in words is "one million, one hundred thirty-one thousand, nine hundred fifty-nine".