1125123541 has 4 divisors (see below), whose sum is σ = 1128140332. Its totient is φ = 1122106752.

The previous prime is 1125123533. The next prime is 1125123577. The reversal of 1125123541 is 1453215211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 226622916 + 898500625 = 15054^2 + 29975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125123541 - 2³ = 1125123533 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 (1125123341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1507836 + ... + 1508581.

It is an arithmetic number, because the mean of its divisors is an integer number (282035083).

Almost surely, 2^1125123541 is an apocalyptic number.

It is an amenable number.

1125123541 is a deficient number, since it is larger than the sum of its proper divisors (3016791).

1125123541 is an equidigital number, since it uses as much as digits as its factorization.

1125123541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016790.

The product of its digits is 1200, while the sum is 25.

The square root of 1125123541 is about 33542.8612524334. The cubic root of 1125123541 is about 1040.0799805970.

Adding to 1125123541 its reverse (1453215211), we get a palindrome (2578338752).

The spelling of 1125123541 in words is "one billion, one hundred twenty-five million, one hundred twenty-three thousand, five hundred forty-one".