4073521 has 2 divisors, whose sum is σ = 4073522. Its totient is φ = 4073520.

The previous prime is 4073513. The next prime is 4073551. The reversal of 4073521 is 1253704.

4073521 is nontrivially palindromic in base 12.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3857296 + 216225 = 1964^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 4073521 - 2³ = 4073513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4073492 and 4073501.

It is not a weakly prime, because it can be changed into another prime (4073501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2036760 + 2036761.

It is an arithmetic number, because the mean of its divisors is an integer number (2036761).

Almost surely, 2^4073521 is an apocalyptic number.

It is an amenable number.

4073521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4073521 is an equidigital number, since it uses as much as digits as its factorization.

4073521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 4073521 is about 2018.2965589824. The cubic root of 4073521 is about 159.7067676081.

The spelling of 4073521 in words is "four million, seventy-three thousand, five hundred twenty-one".