1131242505 has 8 divisors (see below), whose sum is σ = 1809988032. Its totient is φ = 603329328.

The previous prime is 1131242447. The next prime is 1131242513. The reversal of 1131242505 is 5052421311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131242505 - 2²⁶ = 1064133641 is a prime.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 37708069 + ... + 37708098.

It is an arithmetic number, because the mean of its divisors is an integer number (226248504).

Almost surely, 2^1131242505 is an apocalyptic number.

1131242505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131242505 is a deficient number, since it is larger than the sum of its proper divisors (678745527).

1131242505 is an equidigital number, since it uses as much as digits as its factorization.

1131242505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75416175.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1131242505 is about 33633.9486977072. The cubic root of 1131242505 is about 1041.9620582066.

Adding to 1131242505 its reverse (5052421311), we get a palindrome (6183663816).

The spelling of 1131242505 in words is "one billion, one hundred thirty-one million, two hundred forty-two thousand, five hundred five".