641582 has 4 divisors (see below), whose sum is σ = 962376. Its totient is φ = 320790.

The previous prime is 641581. The next prime is 641623. The reversal of 641582 is 285146.

641582 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 285146 = 2 ⋅142573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160394 + ... + 160397.

It is an arithmetic number, because the mean of its divisors is an integer number (240594).

2⁶⁴¹⁵⁸² is an apocalyptic number.

641582 is a deficient number, since it is larger than the sum of its proper divisors (320794).

641582 is a wasteful number, since it uses less digits than its factorization.

641582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320793.

The product of its digits is 1920, while the sum is 26.

The square root of 641582 is about 800.9881397374. The cubic root of 641582 is about 86.2483357517.

The spelling of 641582 in words is "six hundred forty-one thousand, five hundred eighty-two".