43241521 has 2 divisors, whose sum is σ = 43241522. Its totient is φ = 43241520.

The previous prime is 43241491. The next prime is 43241537. The reversal of 43241521 is 12514234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42837025 + 404496 = 6545^2 + 636^2 .

It is a cyclic number.

It is not a de Polignac number, because 43241521 - 2²³ = 34852913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43241492 and 43241501.

It is not a weakly prime, because it can be changed into another prime (43248521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21620760 + 21620761.

It is an arithmetic number, because the mean of its divisors is an integer number (21620761).

Almost surely, 2^43241521 is an apocalyptic number.

It is an amenable number.

43241521 is a deficient number, since it is larger than the sum of its proper divisors (1).

43241521 is an equidigital number, since it uses as much as digits as its factorization.

43241521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 22.

The square root of 43241521 is about 6575.8285409521. The cubic root of 43241521 is about 350.9945075344.

Adding to 43241521 its reverse (12514234), we get a palindrome (55755755).

It can be divided in two parts, 43 and 241521, that multiplied together give a triangular number (10385403 = T₄₅₅₇).

The spelling of 43241521 in words is "forty-three million, two hundred forty-one thousand, five hundred twenty-one".