1125454511 has 4 divisors (see below), whose sum is σ = 1127334000. Its totient is φ = 1123575024.

The previous prime is 1125454507. The next prime is 1125454571. The reversal of 1125454511 is 1154545211.

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 1125454511 - 2² = 1125454507 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 (1125454571) 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, 938846 + ... + 940043.

It is an arithmetic number, because the mean of its divisors is an integer number (281833500).

Almost surely, 2^1125454511 is an apocalyptic number.

1125454511 is a deficient number, since it is larger than the sum of its proper divisors (1879489).

1125454511 is an equidigital number, since it uses as much as digits as its factorization.

1125454511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879488.

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

The square root of 1125454511 is about 33547.7944282482. The cubic root of 1125454511 is about 1040.1819550352.

Adding to 1125454511 its reverse (1154545211), we get a palindrome (2279999722).

The spelling of 1125454511 in words is "one billion, one hundred twenty-five million, four hundred fifty-four thousand, five hundred eleven".