641915 has 16 divisors (see below), whose sum is σ = 842400. Its totient is φ = 467712.

The previous prime is 641909. The next prime is 641923. The reversal of 641915 is 519146.

It is not a de Polignac number, because 641915 - 2¹⁰ = 640891 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2639 + ... + 2871.

It is an arithmetic number, because the mean of its divisors is an integer number (52650).

2⁶⁴¹⁹¹⁵ is an apocalyptic number.

641915 is a deficient number, since it is larger than the sum of its proper divisors (200485).

641915 is a wasteful number, since it uses less digits than its factorization.

641915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286.

The product of its digits is 1080, while the sum is 26.

The square root of 641915 is about 801.1959810184. The cubic root of 641915 is about 86.2632549817.

The spelling of 641915 in words is "six hundred forty-one thousand, nine hundred fifteen".