8642181 has 16 divisors (see below), whose sum is σ = 12096000. Its totient is φ = 5478000.

The previous prime is 8642173. The next prime is 8642189. The reversal of 8642181 is 1812468.

8642181 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8642173) and next prime (8642189).

It is not a de Polignac number, because 8642181 - 2³ = 8642173 is a prime.

It is a super-2 number, since 2×8642181² = 149374584873522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8642189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17070 + ... + 17568.

It is an arithmetic number, because the mean of its divisors is an integer number (756000).

Almost surely, 2^8642181 is an apocalyptic number.

It is an amenable number.

8642181 is a deficient number, since it is larger than the sum of its proper divisors (3453819).

8642181 is a wasteful number, since it uses less digits than its factorization.

8642181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776.

The product of its digits is 3072, while the sum is 30.

The square root of 8642181 is about 2939.7586635641. The cubic root of 8642181 is about 205.2143781557.

The spelling of 8642181 in words is "eight million, six hundred forty-two thousand, one hundred eighty-one".