641495 has 8 divisors (see below), whose sum is σ = 815184. Its totient is φ = 482944.

The previous prime is 641491. The next prime is 641513. The reversal of 641495 is 594146.

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 641495 - 2² = 641491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641491) 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, 3689 + ... + 3858.

It is an arithmetic number, because the mean of its divisors is an integer number (101898).

2⁶⁴¹⁴⁹⁵ is an apocalyptic number.

641495 is a deficient number, since it is larger than the sum of its proper divisors (173689).

641495 is a wasteful number, since it uses less digits than its factorization.

641495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7569.

The product of its digits is 4320, while the sum is 29.

The square root of 641495 is about 800.9338299760. The cubic root of 641495 is about 86.2444370843.

The spelling of 641495 in words is "six hundred forty-one thousand, four hundred ninety-five".