4052521 has 4 divisors (see below), whose sum is σ = 4420944. Its totient is φ = 3684100.

The previous prime is 4052513. The next prime is 4052527. The reversal of 4052521 is 1252504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4052521 - 2³ = 4052513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4052527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184195 + ... + 184216.

It is an arithmetic number, because the mean of its divisors is an integer number (1105236).

Almost surely, 2^4052521 is an apocalyptic number.

It is an amenable number.

4052521 is a deficient number, since it is larger than the sum of its proper divisors (368423).

4052521 is a wasteful number, since it uses less digits than its factorization.

4052521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368422.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 4052521 is about 2013.0874297953. The cubic root of 4052521 is about 159.4318521254.

It can be divided in two parts, 405 and 2521, that added together give a triangular number (2926 = T₇₆).

The spelling of 4052521 in words is "four million, fifty-two thousand, five hundred twenty-one".