8545921 has 4 divisors (see below), whose sum is σ = 8551872. Its totient is φ = 8539972.

The previous prime is 8545909. The next prime is 8545937. The reversal of 8545921 is 1295458.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8545921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8545961) 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, 660 + ... + 4186.

It is an arithmetic number, because the mean of its divisors is an integer number (2137968).

Almost surely, 2^8545921 is an apocalyptic number.

It is an amenable number.

8545921 is a deficient number, since it is larger than the sum of its proper divisors (5951).

8545921 is a wasteful number, since it uses less digits than its factorization.

8545921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5950.

The product of its digits is 14400, while the sum is 34.

The square root of 8545921 is about 2923.3407259504. The cubic root of 8545921 is about 204.4496122692.

The spelling of 8545921 in words is "eight million, five hundred forty-five thousand, nine hundred twenty-one".