1125445511 has 4 divisors (see below), whose sum is σ = 1131663624. Its totient is φ = 1119227400.

The previous prime is 1125445469. The next prime is 1125445549. The reversal of 1125445511 is 1155445211.

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 1125445511 - 2²² = 1121251207 is a prime.

It is a super-2 number, since 2×1125445511² = 2533255196460102242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125445571) 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, 3108785 + ... + 3109146.

It is an arithmetic number, because the mean of its divisors is an integer number (282915906).

Almost surely, 2^1125445511 is an apocalyptic number.

1125445511 is a deficient number, since it is larger than the sum of its proper divisors (6218113).

1125445511 is an equidigital number, since it uses as much as digits as its factorization.

1125445511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6218112.

The product of its digits is 4000, while the sum is 29.

The square root of 1125445511 is about 33547.6602909950. The cubic root of 1125445511 is about 1040.1791823294.

It can be divided in two parts, 11254 and 45511, that added together give a palindrome (56765).

The spelling of 1125445511 in words is "one billion, one hundred twenty-five million, four hundred forty-five thousand, five hundred eleven".