641078 has 4 divisors (see below), whose sum is σ = 961620. Its totient is φ = 320538.

The previous prime is 641077. The next prime is 641083. The reversal of 641078 is 870146.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160268 + ... + 160271.

It is an arithmetic number, because the mean of its divisors is an integer number (240405).

2⁶⁴¹⁰⁷⁸ is an apocalyptic number.

641078 is a deficient number, since it is larger than the sum of its proper divisors (320542).

641078 is a wasteful number, since it uses less digits than its factorization.

641078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320541.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 641078 is about 800.6734665268. The cubic root of 641078 is about 86.2257454729.

The spelling of 641078 in words is "six hundred forty-one thousand, seventy-eight".