6441621 has 8 divisors (see below), whose sum is σ = 8602560. Its totient is φ = 4287552.

The previous prime is 6441607. The next prime is 6441629. The reversal of 6441621 is 1261446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6441621 - 2⁶ = 6441557 is a prime.

It is a super-2 number, since 2×6441621² = 82988962215282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6441591 and 6441600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6441629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165 + ... + 3773.

It is an arithmetic number, because the mean of its divisors is an integer number (1075320).

Almost surely, 2^6441621 is an apocalyptic number.

It is an amenable number.

6441621 is a deficient number, since it is larger than the sum of its proper divisors (2160939).

6441621 is a wasteful number, since it uses less digits than its factorization.

6441621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435.

The product of its digits is 1152, while the sum is 24.

The square root of 6441621 is about 2538.0348697368. The cubic root of 6441621 is about 186.0651581174.

The spelling of 6441621 in words is "six million, four hundred forty-one thousand, six hundred twenty-one".