1131087457 has 2 divisors, whose sum is σ = 1131087458. Its totient is φ = 1131087456.

The previous prime is 1131087449. The next prime is 1131087479. The reversal of 1131087457 is 7547801311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 799701841 + 331385616 = 28279^2 + 18204^2 .

It is an emirp because it is prime and its reverse (7547801311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131087457 - 2³ = 1131087449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131087427) 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, 565543728 + 565543729.

It is an arithmetic number, because the mean of its divisors is an integer number (565543729).

Almost surely, 2^1131087457 is an apocalyptic number.

It is an amenable number.

1131087457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131087457 is an equidigital number, since it uses as much as digits as its factorization.

1131087457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 1131087457 is about 33631.6436856720. The cubic root of 1131087457 is about 1041.9144522884.

Adding to 1131087457 its reverse (7547801311), we get a palindrome (8678888768).

The spelling of 1131087457 in words is "one billion, one hundred thirty-one million, eighty-seven thousand, four hundred fifty-seven".