1125240311 has 4 divisors (see below), whose sum is σ = 1211797272. Its totient is φ = 1038683352.

The previous prime is 1125240307. The next prime is 1125240313. The reversal of 1125240311 is 1130425211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1125240311 - 2² = 1125240307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125240313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43278461 + ... + 43278486.

It is an arithmetic number, because the mean of its divisors is an integer number (302949318).

Almost surely, 2^1125240311 is an apocalyptic number.

1125240311 is a deficient number, since it is larger than the sum of its proper divisors (86556961).

1125240311 is an equidigital number, since it uses as much as digits as its factorization.

1125240311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86556960.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1125240311 is about 33544.6018160896. The cubic root of 1125240311 is about 1040.1159606275.

Adding to 1125240311 its reverse (1130425211), we get a palindrome (2255665522).

The spelling of 1125240311 in words is "one billion, one hundred twenty-five million, two hundred forty thousand, three hundred eleven".