641027 has 4 divisors (see below), whose sum is σ = 643680. Its totient is φ = 638376.

The previous prime is 640993. The next prime is 641051. The reversal of 641027 is 720146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641027 - 2⁶ = 640963 is a prime.

It is a super-2 number, since 2×641027² = 821831229458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923 + ... + 1460.

It is an arithmetic number, because the mean of its divisors is an integer number (160920).

2⁶⁴¹⁰²⁷ is an apocalyptic number.

641027 is a deficient number, since it is larger than the sum of its proper divisors (2653).

641027 is a wasteful number, since it uses less digits than its factorization.

641027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 641027 is about 800.6416177042. The cubic root of 641027 is about 86.2234588923.

The spelling of 641027 in words is "six hundred forty-one thousand, twenty-seven".