41405521 has 2 divisors, whose sum is σ = 41405522. Its totient is φ = 41405520.

The previous prime is 41405513. The next prime is 41405537. The reversal of 41405521 is 12550414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31764496 + 9641025 = 5636^2 + 3105^2 .

It is a cyclic number.

It is not a de Polignac number, because 41405521 - 2³ = 41405513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 41405492 and 41405501.

It is not a weakly prime, because it can be changed into another prime (41405321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20702760 + 20702761.

It is an arithmetic number, because the mean of its divisors is an integer number (20702761).

Almost surely, 2^41405521 is an apocalyptic number.

It is an amenable number.

41405521 is a deficient number, since it is larger than the sum of its proper divisors (1).

41405521 is an equidigital number, since it uses as much as digits as its factorization.

41405521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 41405521 is about 6434.7121924761. The cubic root of 41405521 is about 345.9548455893.

Adding to 41405521 its reverse (12550414), we get a palindrome (53955935).

The spelling of 41405521 in words is "forty-one million, four hundred five thousand, five hundred twenty-one".