1131456587 has 2 divisors, whose sum is σ = 1131456588. Its totient is φ = 1131456586.

The previous prime is 1131456583. The next prime is 1131456611. The reversal of 1131456587 is 7856541311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131456587 - 2² = 1131456583 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131456583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565728293 + 565728294.

It is an arithmetic number, because the mean of its divisors is an integer number (565728294).

Almost surely, 2^1131456587 is an apocalyptic number.

1131456587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131456587 is an equidigital number, since it uses as much as digits as its factorization.

1131456587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 1131456587 is about 33637.1310756432. The cubic root of 1131456587 is about 1042.0277827677.

Adding to 1131456587 its reverse (7856541311), we get a palindrome (8987997898).

The spelling of 1131456587 in words is "one billion, one hundred thirty-one million, four hundred fifty-six thousand, five hundred eighty-seven".