641615 has 8 divisors (see below), whose sum is σ = 829248. Its totient is φ = 473760.

The previous prime is 641581. The next prime is 641623. The reversal of 641615 is 516146.

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

It is not a de Polignac number, because 641615 - 2⁶ = 641551 is a prime.

It is a Duffinian number.

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, 4871 + ... + 5000.

It is an arithmetic number, because the mean of its divisors is an integer number (103656).

2⁶⁴¹⁶¹⁵ is an apocalyptic number.

641615 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

641615 is a deficient number, since it is larger than the sum of its proper divisors (187633).

641615 is a wasteful number, since it uses less digits than its factorization.

641615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9889.

The product of its digits is 720, while the sum is 23.

The square root of 641615 is about 801.0087390285. The cubic root of 641615 is about 86.2498144643.

The spelling of 641615 in words is "six hundred forty-one thousand, six hundred fifteen".