1125131313 has 4 divisors (see below), whose sum is σ = 1500175088. Its totient is φ = 750087540.

The previous prime is 1125131297. The next prime is 1125131321. The reversal of 1125131313 is 3131315211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1125131313 - 2⁴ = 1125131297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1125131313.

It is not an unprimeable number, because it can be changed into a prime (1125131323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187521883 + ... + 187521888.

It is an arithmetic number, because the mean of its divisors is an integer number (375043772).

Almost surely, 2^1125131313 is an apocalyptic number.

It is an amenable number.

1125131313 is a deficient number, since it is larger than the sum of its proper divisors (375043775).

1125131313 is an equidigital number, since it uses as much as digits as its factorization.

1125131313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375043774.

The product of its digits is 270, while the sum is 21.

The square root of 1125131313 is about 33542.9771040079. The cubic root of 1125131313 is about 1040.0823754401.

Adding to 1125131313 its reverse (3131315211), we get a palindrome (4256446524).

The spelling of 1125131313 in words is "one billion, one hundred twenty-five million, one hundred thirty-one thousand, three hundred thirteen".