8181250 has 96 divisors (see below), whose sum is σ = 20248704. Its totient is φ = 2400000.

The previous prime is 8181221. The next prime is 8181253. The reversal of 8181250 is 521818.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 47 ways as a sum of consecutive naturals, for example, 481242 + ... + 481258.

It is an arithmetic number, because the mean of its divisors is an integer number (210924).

Almost surely, 2^8181250 is an apocalyptic number.

8181250 is an abundant number, since it is smaller than the sum of its proper divisors (12067454).

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

8181250 is a wasteful number, since it uses less digits than its factorization.

8181250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 8181250 is about 2860.2884469927. The cubic root of 8181250 is about 201.4991513160.

The spelling of 8181250 in words is "eight million, one hundred eighty-one thousand, two hundred fifty".