641726 has 8 divisors (see below), whose sum is σ = 977160. Its totient is φ = 316008.

The previous prime is 641713. The next prime is 641747. The reversal of 641726 is 627146.

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

It is a junction number, because it is equal to n+sod(n) for n = 641695 and 641704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2261 + ... + 2528.

It is an arithmetic number, because the mean of its divisors is an integer number (122145).

2⁶⁴¹⁷²⁶ is an apocalyptic number.

641726 is a deficient number, since it is larger than the sum of its proper divisors (335434).

641726 is a wasteful number, since it uses less digits than its factorization.

641726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4858.

The product of its digits is 2016, while the sum is 26.

The square root of 641726 is about 801.0780236656. The cubic root of 641726 is about 86.2547879440.

The spelling of 641726 in words is "six hundred forty-one thousand, seven hundred twenty-six".