1011125545 has 4 divisors (see below), whose sum is σ = 1213350660. Its totient is φ = 808900432.

The previous prime is 1011125537. The next prime is 1011125561. The reversal of 1011125545 is 5455211101.

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 564395049 + 446730496 = 23757^2 + 21136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011125545 - 2³ = 1011125537 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101112550 + ... + 101112559.

It is an arithmetic number, because the mean of its divisors is an integer number (303337665).

Almost surely, 2^1011125545 is an apocalyptic number.

It is an amenable number.

1011125545 is a deficient number, since it is larger than the sum of its proper divisors (202225115).

1011125545 is an equidigital number, since it uses as much as digits as its factorization.

1011125545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202225114.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1011125545 is about 31798.2003421577. The cubic root of 1011125545 is about 1003.6948462970.

Adding to 1011125545 its reverse (5455211101), we get a palindrome (6466336646).

The spelling of 1011125545 in words is "one billion, eleven million, one hundred twenty-five thousand, five hundred forty-five".