646241 has 4 divisors (see below), whose sum is σ = 648852. Its totient is φ = 643632.

The previous prime is 646237. The next prime is 646253. The reversal of 646241 is 142646.

It is a happy number.

646241 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 2 ways, for example, as 163216 + 483025 = 404^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 646241 - 2² = 646237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890 + ... + 1443.

It is an arithmetic number, because the mean of its divisors is an integer number (162213).

2⁶⁴⁶²⁴¹ is an apocalyptic number.

It is an amenable number.

646241 is a deficient number, since it is larger than the sum of its proper divisors (2611).

646241 is a wasteful number, since it uses less digits than its factorization.

646241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610.

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

The square root of 646241 is about 803.8911617875. The cubic root of 646241 is about 86.4566033557.

Adding to 646241 its reverse (142646), we get a palindrome (788887).

It can be divided in two parts, 64 and 6241, that multiplied together give a square (399424 = 632²).

The spelling of 646241 in words is "six hundred forty-six thousand, two hundred forty-one".