1125405101 has 4 divisors (see below), whose sum is σ = 1125510204. Its totient is φ = 1125300000.

The previous prime is 1125405091. The next prime is 1125405109. The reversal of 1125405101 is 1015045211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1077808900 + 47596201 = 32830^2 + 6899^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125405101 - 2⁶ = 1125405037 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 (1125405109) by changing a digit.

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, 34400 + ... + 58601.

It is an arithmetic number, because the mean of its divisors is an integer number (281377551).

Almost surely, 2^1125405101 is an apocalyptic number.

It is an amenable number.

1125405101 is a deficient number, since it is larger than the sum of its proper divisors (105103).

1125405101 is an equidigital number, since it uses as much as digits as its factorization.

1125405101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105102.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1125405101 is about 33547.0580081175. The cubic root of 1125405101 is about 1040.1667326985.

The spelling of 1125405101 in words is "one billion, one hundred twenty-five million, four hundred five thousand, one hundred one".