41681921 has 4 divisors (see below), whose sum is σ = 42651312. Its totient is φ = 40712532.

The previous prime is 41681917. The next prime is 41681923. The reversal of 41681921 is 12918614.

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: 12918614 = 2 ⋅6459307.

It is a cyclic number.

It is not a de Polignac number, because 41681921 - 2² = 41681917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41681923) 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, 484631 + ... + 484716.

It is an arithmetic number, because the mean of its divisors is an integer number (10662828).

Almost surely, 2^41681921 is an apocalyptic number.

It is an amenable number.

41681921 is a deficient number, since it is larger than the sum of its proper divisors (969391).

41681921 is an equidigital number, since it uses as much as digits as its factorization.

41681921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969390.

The product of its digits is 3456, while the sum is 32.

The square root of 41681921 is about 6456.1537311313. The cubic root of 41681921 is about 346.7229390694.

The spelling of 41681921 in words is "forty-one million, six hundred eighty-one thousand, nine hundred twenty-one".