8181545 has 8 divisors (see below), whose sum is σ = 9836424. Its totient is φ = 6532864.

The previous prime is 8181529. The next prime is 8181577. The reversal of 8181545 is 5451818.

8181545 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in 4 ways, for example, as 5697769 + 2483776 = 2387^2 + 1576^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8181545 - 2⁴ = 8181529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2177 + ... + 4593.

It is an arithmetic number, because the mean of its divisors is an integer number (1229553).

Almost surely, 2^8181545 is an apocalyptic number.

It is an amenable number.

8181545 is a deficient number, since it is larger than the sum of its proper divisors (1654879).

8181545 is a wasteful number, since it uses less digits than its factorization.

8181545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099.

The product of its digits is 6400, while the sum is 32.

The square root of 8181545 is about 2860.3400147535. The cubic root of 8181545 is about 201.5015731764.

The spelling of 8181545 in words is "eight million, one hundred eighty-one thousand, five hundred forty-five".