641942 has 8 divisors (see below), whose sum is σ = 1100496. Its totient is φ = 275112.

The previous prime is 641929. The next prime is 641959. The reversal of 641942 is 249146.

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

It is a congruent number.

It is an unprimeable number.

641942 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22913 + ... + 22940.

It is an arithmetic number, because the mean of its divisors is an integer number (137562).

2⁶⁴¹⁹⁴² is an apocalyptic number.

641942 is a deficient number, since it is larger than the sum of its proper divisors (458554).

641942 is a wasteful number, since it uses less digits than its factorization.

641942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45862.

The product of its digits is 1728, while the sum is 26.

The square root of 641942 is about 801.2128306511. The cubic root of 641942 is about 86.2644644228.

The spelling of 641942 in words is "six hundred forty-one thousand, nine hundred forty-two".