1000541021 has 2 divisors, whose sum is σ = 1000541022. Its totient is φ = 1000541020.

The previous prime is 1000541011. The next prime is 1000541023. The reversal of 1000541021 is 1201450001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 940648900 + 59892121 = 30670^2 + 7739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000541021 is a prime.

Together with 1000541023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000540987 and 1000541005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000541023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500270510 + 500270511.

It is an arithmetic number, because the mean of its divisors is an integer number (500270511).

Almost surely, 2^1000541021 is an apocalyptic number.

It is an amenable number.

1000541021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000541021 is an equidigital number, since it uses as much as digits as its factorization.

1000541021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1000541021 is about 31631.3297380935. The cubic root of 1000541021 is about 1000.1803078205.

Adding to 1000541021 its reverse (1201450001), we get a palindrome (2201991022).

The spelling of 1000541021 in words is "one billion, five hundred forty-one thousand, twenty-one".