4365521 has 2 divisors, whose sum is σ = 4365522. Its totient is φ = 4365520.

The previous prime is 4365511. The next prime is 4365527. The reversal of 4365521 is 1255634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4363921 + 1600 = 2089^2 + 40^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4365521 is a prime.

It is a Chen prime.

It is equal to p₃₀₇₀₈₈ and since 4365521 and 307088 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (4365527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2182760 + 2182761.

It is an arithmetic number, because the mean of its divisors is an integer number (2182761).

Almost surely, 2^4365521 is an apocalyptic number.

It is an amenable number.

4365521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4365521 is an equidigital number, since it uses as much as digits as its factorization.

4365521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 4365521 is about 2089.3829232575. The cubic root of 4365521 is about 163.4351103373.

The spelling of 4365521 in words is "four million, three hundred sixty-five thousand, five hundred twenty-one".