8540549 has 4 divisors (see below), whose sum is σ = 8680620. Its totient is φ = 8400480.

The previous prime is 8540537. The next prime is 8540551. The reversal of 8540549 is 9450458.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1909924 + 6630625 = 1382^2 + 2575^2 .

It is a cyclic number.

It is not a de Polignac number, because 8540549 - 2⁴ = 8540533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8540509) 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, 69944 + ... + 70065.

It is an arithmetic number, because the mean of its divisors is an integer number (2170155).

Almost surely, 2^8540549 is an apocalyptic number.

It is an amenable number.

8540549 is a deficient number, since it is larger than the sum of its proper divisors (140071).

8540549 is a wasteful number, since it uses less digits than its factorization.

8540549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140070.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 8540549 is about 2922.4217696972. The cubic root of 8540549 is about 204.4067640093.

Subtracting 8540549 from its reverse (9450458), we obtain a palindrome (909909).

The spelling of 8540549 in words is "eight million, five hundred forty thousand, five hundred forty-nine".