1021020545 has 32 divisors (see below), whose sum is σ = 1290189600. Its totient is φ = 774660096.

The previous prime is 1021020529. The next prime is 1021020551. The reversal of 1021020545 is 5450201201.

1021020545 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 16 ways, for example, as 226231681 + 794788864 = 15041^2 + 28192^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021020545 - 2⁴ = 1021020529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3220727 + ... + 3221043.

It is an arithmetic number, because the mean of its divisors is an integer number (40318425).

Almost surely, 2^1021020545 is an apocalyptic number.

It is an amenable number.

1021020545 is a deficient number, since it is larger than the sum of its proper divisors (269169055).

1021020545 is a wasteful number, since it uses less digits than its factorization.

1021020545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1021020545 is about 31953.4121026222. The cubic root of 1021020545 is about 1006.9583178431.

Adding to 1021020545 its reverse (5450201201), we get a palindrome (6471221746).

It can be divided in two parts, 10210205 and 45, that multiplied together give a square (459459225 = 21435²).

The spelling of 1021020545 in words is "one billion, twenty-one million, twenty thousand, five hundred forty-five".