8081642 has 8 divisors (see below), whose sum is σ = 12136836. Its totient is φ = 4036032.

The previous prime is 8081641. The next prime is 8081653. The reversal of 8081642 is 2461808.

It can be written as a sum of positive squares in 2 ways, for example, as 8014561 + 67081 = 2831^2 + 259^2 .

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

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (8081641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338 + ... + 4034.

Almost surely, 2^8081642 is an apocalyptic number.

8081642 is a deficient number, since it is larger than the sum of its proper divisors (4055194).

8081642 is a wasteful number, since it uses less digits than its factorization.

8081642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4792.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 8081642 is about 2842.8228928303. The cubic root of 8081642 is about 200.6780486524.

The spelling of 8081642 in words is "eight million, eighty-one thousand, six hundred forty-two".