641854 has 4 divisors (see below), whose sum is σ = 962784. Its totient is φ = 320926.

The previous prime is 641843. The next prime is 641863. The reversal of 641854 is 458146.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160462 + ... + 160465.

It is an arithmetic number, because the mean of its divisors is an integer number (240696).

2⁶⁴¹⁸⁵⁴ is an apocalyptic number.

641854 is a deficient number, since it is larger than the sum of its proper divisors (320930).

641854 is a wasteful number, since it uses less digits than its factorization.

641854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320929.

The product of its digits is 3840, while the sum is 28.

The square root of 641854 is about 801.1579120248. The cubic root of 641854 is about 86.2605224157.

The spelling of 641854 in words is "six hundred forty-one thousand, eight hundred fifty-four".