646141 has 4 divisors (see below), whose sum is σ = 654400. Its totient is φ = 637884.

The previous prime is 646103. The next prime is 646147. The reversal of 646141 is 141646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 141646 = 2 ⋅70823.

It is a cyclic number.

It is not a de Polignac number, because 646141 - 2⁷ = 646013 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 (646147) 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, 4011 + ... + 4168.

It is an arithmetic number, because the mean of its divisors is an integer number (163600).

2⁶⁴⁶¹⁴¹ is an apocalyptic number.

It is an amenable number.

646141 is a deficient number, since it is larger than the sum of its proper divisors (8259).

646141 is an equidigital number, since it uses as much as digits as its factorization.

646141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8258.

The product of its digits is 576, while the sum is 22.

The square root of 646141 is about 803.8289619067. The cubic root of 646141 is about 86.4521436642.

Adding to 646141 its reverse (141646), we get a palindrome (787787).

It can be divided in two parts, 646 and 141, that added together give a palindrome (787).

The spelling of 646141 in words is "six hundred forty-six thousand, one hundred forty-one".