641642 has 4 divisors (see below), whose sum is σ = 962466. Its totient is φ = 320820.

The previous prime is 641639. The next prime is 641681. The reversal of 641642 is 246146.

It is a happy number.

641642 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.

It can be written as a sum of positive squares in only one way, i.e., 519841 + 121801 = 721^2 + 349^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160409 + ... + 160412.

2⁶⁴¹⁶⁴² is an apocalyptic number.

641642 is a deficient number, since it is larger than the sum of its proper divisors (320824).

641642 is a wasteful number, since it uses less digits than its factorization.

641642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320823.

The product of its digits is 1152, while the sum is 23.

The square root of 641642 is about 801.0255925999. The cubic root of 641642 is about 86.2510242825.

Adding to 641642 its reverse (246146), we get a palindrome (887788).

The spelling of 641642 in words is "six hundred forty-one thousand, six hundred forty-two".