1000641 has 8 divisors (see below), whose sum is σ = 1340064. Its totient is φ = 664160.

The previous prime is 1000639. The next prime is 1000651. The reversal of 1000641 is 1460001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000641 - 2¹ = 1000639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000621) 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, 250 + ... + 1436.

It is an arithmetic number, because the mean of its divisors is an integer number (167508).

2^1000641 is an apocalyptic number.

It is an amenable number.

1000641 is a deficient number, since it is larger than the sum of its proper divisors (339423).

1000641 is a wasteful number, since it uses less digits than its factorization.

1000641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1000641 is about 1000.3204486563. The cubic root of 1000641 is about 100.0213621029.

Adding to 1000641 its reverse (1460001), we get a palindrome (2460642).

The spelling of 1000641 in words is "one million, six hundred forty-one", and thus it is an aban number.