8181252 has 18 divisors (see below), whose sum is σ = 20680478. Its totient is φ = 2727072.

The previous prime is 8181221. The next prime is 8181253. The reversal of 8181252 is 2521818.

It can be written as a sum of positive squares in only one way, i.e., 7485696 + 695556 = 2736^2 + 834^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (8181253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113593 + ... + 113664.

Almost surely, 2^8181252 is an apocalyptic number.

It is an amenable number.

8181252 is an abundant number, since it is smaller than the sum of its proper divisors (12499226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8181252 is a wasteful number, since it uses less digits than its factorization.

8181252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227267 (or 227262 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 8181252 is about 2860.2887966078. The cubic root of 8181252 is about 201.4991677356.

The spelling of 8181252 in words is "eight million, one hundred eighty-one thousand, two hundred fifty-two".