621441 has 12 divisors (see below), whose sum is σ = 928980. Its totient is φ = 399840.

The previous prime is 621431. The next prime is 621443. The reversal of 621441 is 144126.

621441 is a `hidden beast` number, since 621 + 4 + 41 = 666.

621441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 103041 + 518400 = 321^2 + 720^2 .

It is not a de Polignac number, because 621441 - 2⁹ = 620929 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (621443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 930 + ... + 1451.

It is an arithmetic number, because the mean of its divisors is an integer number (77415).

2⁶²¹⁴⁴¹ is an apocalyptic number.

It is an amenable number.

621441 is a deficient number, since it is larger than the sum of its proper divisors (307539).

621441 is a wasteful number, since it uses less digits than its factorization.

621441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416 (or 2413 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 621441 is about 788.3152922530. The cubic root of 621441 is about 85.3362001939.

Adding to 621441 its reverse (144126), we get a palindrome (765567).

The spelling of 621441 in words is "six hundred twenty-one thousand, four hundred forty-one".