1006042621 has 4 divisors (see below), whose sum is σ = 1007040700. Its totient is φ = 1005044544.

The previous prime is 1006042619. The next prime is 1006042633. The reversal of 1006042621 is 1262406001.

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 557196025 + 448846596 = 23605^2 + 21186^2 .

It is a cyclic number.

It is not a de Polignac number, because 1006042621 - 2¹ = 1006042619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1006042592 and 1006042601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006042601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497526 + ... + 499543.

It is an arithmetic number, because the mean of its divisors is an integer number (251760175).

Almost surely, 2^1006042621 is an apocalyptic number.

It is an amenable number.

1006042621 is a deficient number, since it is larger than the sum of its proper divisors (998079).

1006042621 is an equidigital number, since it uses as much as digits as its factorization.

1006042621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998078.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1006042621 is about 31718.1749317328. The cubic root of 1006042621 is about 1002.0101635350.

Adding to 1006042621 its reverse (1262406001), we get a palindrome (2268448622).

The spelling of 1006042621 in words is "one billion, six million, forty-two thousand, six hundred twenty-one".