4038521 has 2 divisors, whose sum is σ = 4038522. Its totient is φ = 4038520.

The previous prime is 4038493. The next prime is 4038533. The reversal of 4038521 is 1258304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4020025 + 18496 = 2005^2 + 136^2 .

It is a cyclic number.

It is not a de Polignac number, because 4038521 - 2⁶ = 4038457 is a prime.

It is a Chen prime.

It is equal to p₂₈₅₇₁₀ and since 4038521 and 285710 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 (4038581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2019260 + 2019261.

It is an arithmetic number, because the mean of its divisors is an integer number (2019261).

Almost surely, 2^4038521 is an apocalyptic number.

It is an amenable number.

4038521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4038521 is an equidigital number, since it uses as much as digits as its factorization.

4038521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 4038521 is about 2009.6071755445. The cubic root of 4038521 is about 159.2480470997.

The spelling of 4038521 in words is "four million, thirty-eight thousand, five hundred twenty-one".