4233521 has 2 divisors, whose sum is σ = 4233522. Its totient is φ = 4233520.

The previous prime is 4233499. The next prime is 4233533. The reversal of 4233521 is 1253324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2217121 + 2016400 = 1489^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 4233521 - 2⁶ = 4233457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4233493 and 4233502.

It is not a weakly prime, because it can be changed into another prime (4233571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2116760 + 2116761.

It is an arithmetic number, because the mean of its divisors is an integer number (2116761).

Almost surely, 2^4233521 is an apocalyptic number.

It is an amenable number.

4233521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4233521 is an equidigital number, since it uses as much as digits as its factorization.

4233521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 20.

The square root of 4233521 is about 2057.5521864585. The cubic root of 4233521 is about 161.7709637456.

Adding to 4233521 its reverse (1253324), we get a palindrome (5486845).

The spelling of 4233521 in words is "four million, two hundred thirty-three thousand, five hundred twenty-one".