4547521 has 4 divisors (see below), whose sum is σ = 4960944. Its totient is φ = 4134100.

The previous prime is 4547513. The next prime is 4547531. The reversal of 4547521 is 1257454.

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 4547521 - 2³ = 4547513 is a prime.

It is a Duffinian number.

4547521 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4547521.

It is not an unprimeable number, because it can be changed into a prime (4547531) 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, 206695 + ... + 206716.

It is an arithmetic number, because the mean of its divisors is an integer number (1240236).

Almost surely, 2^4547521 is an apocalyptic number.

It is an amenable number.

4547521 is a deficient number, since it is larger than the sum of its proper divisors (413423).

4547521 is a wasteful number, since it uses less digits than its factorization.

4547521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413422.

The product of its digits is 5600, while the sum is 28.

The square root of 4547521 is about 2132.4917350367. The cubic root of 4547521 is about 165.6754800917.

The spelling of 4547521 in words is "four million, five hundred forty-seven thousand, five hundred twenty-one".