1001641 has 8 divisors (see below), whose sum is σ = 1049600. Its totient is φ = 954720.

The previous prime is 1001639. The next prime is 1001659. The reversal of 1001641 is 1461001.

1001641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1001641 - 2¹ = 1001639 is a prime.

It is a Duffinian number.

1001641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1001621) 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, 2245 + ... + 2653.

It is an arithmetic number, because the mean of its divisors is an integer number (131200).

2^1001641 is an apocalyptic number.

It is an amenable number.

1001641 is a deficient number, since it is larger than the sum of its proper divisors (47959).

1001641 is an equidigital number, since it uses as much as digits as its factorization.

1001641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1001641 is about 1000.8201636658. The cubic root of 1001641 is about 100.0546701063.

Adding to 1001641 its reverse (1461001), we get a palindrome (2462642).

The spelling of 1001641 in words is "one million, one thousand, six hundred forty-one".