641598 has 16 divisors (see below), whose sum is σ = 1304976. Its totient is φ = 210240.

The previous prime is 641581. The next prime is 641623. The reversal of 641598 is 895146.

It is a congruent number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 511 + ... + 1242.

It is an arithmetic number, because the mean of its divisors is an integer number (81561).

2⁶⁴¹⁵⁹⁸ is an apocalyptic number.

641598 is an abundant number, since it is smaller than the sum of its proper divisors (663378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641598 is a wasteful number, since it uses less digits than its factorization.

641598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819.

The product of its digits is 8640, while the sum is 33.

The square root of 641598 is about 800.9981273386. The cubic root of 641598 is about 86.2490527096.

The spelling of 641598 in words is "six hundred forty-one thousand, five hundred ninety-eight".