1125544081 has 2 divisors, whose sum is σ = 1125544082. Its totient is φ = 1125544080.

The previous prime is 1125544073. The next prime is 1125544157. The reversal of 1125544081 is 1804455211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825700225 + 299843856 = 28735^2 + 17316^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125544081 - 2³ = 1125544073 is a prime.

It is a super-2 number, since 2×1125544081² = 2533698956548269122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1125544051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562772040 + 562772041.

It is an arithmetic number, because the mean of its divisors is an integer number (562772041).

Almost surely, 2^1125544081 is an apocalyptic number.

It is an amenable number.

1125544081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125544081 is an equidigital number, since it uses as much as digits as its factorization.

1125544081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 1125544081 is about 33549.1293627718. The cubic root of 1125544081 is about 1040.2095488133.

Adding to 1125544081 its reverse (1804455211), we get a palindrome (2929999292).

The spelling of 1125544081 in words is "one billion, one hundred twenty-five million, five hundred forty-four thousand, eighty-one".