1021125145 has 12 divisors (see below), whose sum is σ = 1301671404. Its totient is φ = 768846080.

The previous prime is 1021125139. The next prime is 1021125163. The reversal of 1021125145 is 5415211201.

1021125145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 133263936 + 887861209 = 11544^2 + 29797^2 .

It is not a de Polignac number, because 1021125145 - 2³ = 1021125137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351886 + ... + 354775.

It is an arithmetic number, because the mean of its divisors is an integer number (108472617).

Almost surely, 2^1021125145 is an apocalyptic number.

It is an amenable number.

1021125145 is a deficient number, since it is larger than the sum of its proper divisors (280546259).

1021125145 is an equidigital number, since it uses as much as digits as its factorization.

1021125145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706700 (or 706683 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1021125145 is about 31955.0488186139. The cubic root of 1021125145 is about 1006.9927031268.

Adding to 1021125145 its reverse (5415211201), we get a palindrome (6436336346).

The spelling of 1021125145 in words is "one billion, twenty-one million, one hundred twenty-five thousand, one hundred forty-five".