41705621 has 2 divisors, whose sum is σ = 41705622. Its totient is φ = 41705620.

The previous prime is 41705617. The next prime is 41705663. The reversal of 41705621 is 12650714.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39828721 + 1876900 = 6311^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 41705621 - 2² = 41705617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41705611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20852810 + 20852811.

It is an arithmetic number, because the mean of its divisors is an integer number (20852811).

Almost surely, 2^41705621 is an apocalyptic number.

It is an amenable number.

41705621 is a deficient number, since it is larger than the sum of its proper divisors (1).

41705621 is an equidigital number, since it uses as much as digits as its factorization.

41705621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 41705621 is about 6457.9889284513. The cubic root of 41705621 is about 346.7886412293.

The spelling of 41705621 in words is "forty-one million, seven hundred five thousand, six hundred twenty-one".