641215 has 8 divisors (see below), whose sum is σ = 774000. Its totient is φ = 509952.

The previous prime is 641213. The next prime is 641227. The reversal of 641215 is 512146.

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 641215 - 2¹ = 641213 is a prime.

It is a super-2 number, since 2×641215² = 822313352450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641192 and 641201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641213) 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, 1036 + ... + 1534.

It is an arithmetic number, because the mean of its divisors is an integer number (96750).

2⁶⁴¹²¹⁵ is an apocalyptic number.

641215 is a deficient number, since it is larger than the sum of its proper divisors (132785).

641215 is a wasteful number, since it uses less digits than its factorization.

641215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761.

The product of its digits is 240, while the sum is 19.

The square root of 641215 is about 800.7590149352. The cubic root of 641215 is about 86.2318872558.

The spelling of 641215 in words is "six hundred forty-one thousand, two hundred fifteen".