641901 has 16 divisors (see below), whose sum is σ = 936320. Its totient is φ = 388800.

The previous prime is 641897. The next prime is 641909. The reversal of 641901 is 109146.

It is not a de Polignac number, because 641901 - 2² = 641897 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4176 + ... + 4326.

It is an arithmetic number, because the mean of its divisors is an integer number (58520).

2⁶⁴¹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

641901 is a deficient number, since it is larger than the sum of its proper divisors (294419).

641901 is a wasteful number, since it uses less digits than its factorization.

641901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 641901 is about 801.1872440323. The cubic root of 641901 is about 86.2626278507.

The spelling of 641901 in words is "six hundred forty-one thousand, nine hundred one".