100641 has 4 divisors (see below), whose sum is σ = 134192. Its totient is φ = 67092.

The previous prime is 100621. The next prime is 100649. The reversal of 100641 is 146001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 100641 - 2⁵ = 100609 is a prime.

It is a super-2 number, since 2×100641² = 20257221762, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100649) 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, 16771 + ... + 16776.

It is an arithmetic number, because the mean of its divisors is an integer number (33548).

2¹⁰⁰⁶⁴¹ is an apocalyptic number.

It is an amenable number.

100641 is a deficient number, since it is larger than the sum of its proper divisors (33551).

100641 is an equidigital number, since it uses as much as digits as its factorization.

100641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33550.

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

The square root of 100641 is about 317.2396570418. The cubic root of 100641 is about 46.5148524644.

Adding to 100641 its reverse (146001), we get a palindrome (246642).

It can be divided in two parts, 100 and 641, that added together give a triangular number (741 = T₃₈).

The spelling of 100641 in words is "one hundred thousand, six hundred forty-one".