1020545 has 8 divisors (see below), whose sum is σ = 1230120. Its totient is φ = 812800.

The previous prime is 1020541. The next prime is 1020557. The reversal of 1020545 is 5450201.

It can be written as a sum of positive squares in 4 ways, for example, as 559504 + 461041 = 748^2 + 679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020545 - 2² = 1020541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1751 + ... + 2259.

It is an arithmetic number, because the mean of its divisors is an integer number (153765).

2^1020545 is an apocalyptic number.

It is an amenable number.

1020545 is a deficient number, since it is larger than the sum of its proper divisors (209575).

1020545 is an equidigital number, since it uses as much as digits as its factorization.

1020545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1020545 is about 1010.2202730098. The cubic root of 1020545 is about 100.6801961748.

Adding to 1020545 its reverse (5450201), we get a palindrome (6470746).

The spelling of 1020545 in words is "one million, twenty thousand, five hundred forty-five".