641515 has 8 divisors (see below), whose sum is σ = 879840. Its totient is φ = 439872.

The previous prime is 641513. The next prime is 641519. The reversal of 641515 is 515146.

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

It is a cyclic number.

It is not a de Polignac number, because 641515 - 2¹ = 641513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9130 + ... + 9199.

It is an arithmetic number, because the mean of its divisors is an integer number (109980).

2⁶⁴¹⁵¹⁵ is an apocalyptic number.

641515 is a deficient number, since it is larger than the sum of its proper divisors (238325).

641515 is a wasteful number, since it uses less digits than its factorization.

641515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18341.

The product of its digits is 600, while the sum is 22.

The square root of 641515 is about 800.9463153046. The cubic root of 641515 is about 86.2453333609.

It can be divided in two parts, 641 and 515, that added together give a square (1156 = 34²).

The spelling of 641515 in words is "six hundred forty-one thousand, five hundred fifteen".