41521 has 2 divisors, whose sum is σ = 41522. Its totient is φ = 41520.

The previous prime is 41519. The next prime is 41539. The reversal of 41521 is 12514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40000 + 1521 = 200^2 + 39^2 .

It is a cyclic number.

It is not a de Polignac number, because 41521 - 2¹ = 41519 is a prime.

Together with 41519, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is not a weakly prime, because it can be changed into another prime (41221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20760 + 20761.

It is an arithmetic number, because the mean of its divisors is an integer number (20761).

2⁴¹⁵²¹ is an apocalyptic number.

It is an amenable number.

41521 is a deficient number, since it is larger than the sum of its proper divisors (1).

41521 is an equidigital number, since it uses as much as digits as its factorization.

41521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40, while the sum is 13.

The square root of 41521 is about 203.7670238287. The cubic root of 41521 is about 34.6276166963.

It can be divided in two parts, 4 and 1521, that multiplied together give a square (6084 = 78²).

The spelling of 41521 in words is "forty-one thousand, five hundred twenty-one".