1020204545 has 4 divisors (see below), whose sum is σ = 1224245460. Its totient is φ = 816163632.

The previous prime is 1020204469. The next prime is 1020204553. The reversal of 1020204545 is 5454020201.

It is a happy number.

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 294225409 + 725979136 = 17153^2 + 26944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020204545 - 2¹² = 1020200449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020204545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102020450 + ... + 102020459.

It is an arithmetic number, because the mean of its divisors is an integer number (306061365).

Almost surely, 2^1020204545 is an apocalyptic number.

It is an amenable number.

1020204545 is a deficient number, since it is larger than the sum of its proper divisors (204040915).

1020204545 is an equidigital number, since it uses as much as digits as its factorization.

1020204545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204040914.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 1020204545 is about 31940.6409610077. The cubic root of 1020204545 is about 1006.6899925275.

Adding to 1020204545 its reverse (5454020201), we get a palindrome (6474224746).

The spelling of 1020204545 in words is "one billion, twenty million, two hundred four thousand, five hundred forty-five".