8545521 has 4 divisors (see below), whose sum is σ = 11394032. Its totient is φ = 5697012.

The previous prime is 8545499. The next prime is 8545529. The reversal of 8545521 is 1255458.

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 not a de Polignac number, because 8545521 - 2¹¹ = 8543473 is a prime.

It is a super-2 number, since 2×8545521² = 146051858322882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8545529) 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, 1424251 + ... + 1424256.

It is an arithmetic number, because the mean of its divisors is an integer number (2848508).

Almost surely, 2^8545521 is an apocalyptic number.

It is an amenable number.

8545521 is a deficient number, since it is larger than the sum of its proper divisors (2848511).

8545521 is a wasteful number, since it uses less digits than its factorization.

8545521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848510.

The product of its digits is 8000, while the sum is 30.

The square root of 8545521 is about 2923.2723102715. The cubic root of 8545521 is about 204.4464223996.

The spelling of 8545521 in words is "eight million, five hundred forty-five thousand, five hundred twenty-one".