1125053511 has 4 divisors (see below), whose sum is σ = 1500071352. Its totient is φ = 750035672.

The previous prime is 1125053507. The next prime is 1125053537. The reversal of 1125053511 is 1153505211.

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 1125053511 - 2² = 1125053507 is a prime.

It is a super-2 number, since 2×1125053511² = 2531490805226854242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125053551) 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, 187508916 + ... + 187508921.

It is an arithmetic number, because the mean of its divisors is an integer number (375017838).

Almost surely, 2^1125053511 is an apocalyptic number.

1125053511 is a deficient number, since it is larger than the sum of its proper divisors (375017841).

1125053511 is an equidigital number, since it uses as much as digits as its factorization.

1125053511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375017840.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1125053511 is about 33541.8173479017. The cubic root of 1125053511 is about 1040.0584012446.

Adding to 1125053511 its reverse (1153505211), we get a palindrome (2278558722).

The spelling of 1125053511 in words is "one billion, one hundred twenty-five million, fifty-three thousand, five hundred eleven".