4053521 has 4 divisors (see below), whose sum is σ = 4072944. Its totient is φ = 4034100.

The previous prime is 4053503. The next prime is 4053523. The reversal of 4053521 is 1253504.

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 4053521 - 2⁶ = 4053457 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a zygodrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 4053493 and 4053502.

It is not an unprimeable number, because it can be changed into a prime (4053523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9395 + ... + 9816.

It is an arithmetic number, because the mean of its divisors is an integer number (1018236).

Almost surely, 2^4053521 is an apocalyptic number.

It is an amenable number.

4053521 is a deficient number, since it is larger than the sum of its proper divisors (19423).

4053521 is a wasteful number, since it uses less digits than its factorization.

4053521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19422.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 4053521 is about 2013.3357891817. The cubic root of 4053521 is about 159.4449648471. Note that the first 3 decimals are identical.

The spelling of 4053521 in words is "four million, fifty-three thousand, five hundred twenty-one".