6411643 has 4 divisors (see below), whose sum is σ = 7327600. Its totient is φ = 5495688.

The previous prime is 6411593. The next prime is 6411661. The reversal of 6411643 is 3461146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6411643 - 2⁹ = 6411131 is a prime.

It is a super-2 number, since 2×6411643² = 82218331918898, which contains 22 as substring.

6411643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6411673) 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, 457968 + ... + 457981.

It is an arithmetic number, because the mean of its divisors is an integer number (1831900).

Almost surely, 2^6411643 is an apocalyptic number.

6411643 is a deficient number, since it is larger than the sum of its proper divisors (915957).

6411643 is an equidigital number, since it uses as much as digits as its factorization.

6411643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915956.

The product of its digits is 1728, while the sum is 25.

The square root of 6411643 is about 2532.1222324367. The cubic root of 6411643 is about 185.7760726788.

Adding to 6411643 its reverse (3461146), we get a palindrome (9872789).

The spelling of 6411643 in words is "six million, four hundred eleven thousand, six hundred forty-three".