41821621 has 4 divisors (see below), whose sum is σ = 41846112. Its totient is φ = 41797132.

The previous prime is 41821607. The next prime is 41821631. The reversal of 41821621 is 12612814.

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.

It is a cyclic number.

It is not a de Polignac number, because 41821621 - 2⁵ = 41821589 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 (41821631) 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, 9475 + ... + 13168.

It is an arithmetic number, because the mean of its divisors is an integer number (10461528).

Almost surely, 2^41821621 is an apocalyptic number.

It is an amenable number.

41821621 is a deficient number, since it is larger than the sum of its proper divisors (24491).

41821621 is a wasteful number, since it uses less digits than its factorization.

41821621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24490.

The product of its digits is 768, while the sum is 25.

The square root of 41821621 is about 6466.9638161969. The cubic root of 41821621 is about 347.1098628673.

The spelling of 41821621 in words is "forty-one million, eight hundred twenty-one thousand, six hundred twenty-one".