8081842 has 4 divisors (see below), whose sum is σ = 12122766. Its totient is φ = 4040920.

The previous prime is 8081839. The next prime is 8081849. The reversal of 8081842 is 2481808.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6869641 + 1212201 = 2621^2 + 1101^2 .

It is a super-2 number, since 2×8081842² = 130632340225928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8081849) 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 as a sum of consecutive naturals, namely, 2020459 + ... + 2020462.

Almost surely, 2^8081842 is an apocalyptic number.

8081842 is a deficient number, since it is larger than the sum of its proper divisors (4040924).

8081842 is a wasteful number, since it uses less digits than its factorization.

8081842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040923.

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 8081842 is about 2842.8580689159. The cubic root of 8081842 is about 200.6797040618.

The spelling of 8081842 in words is "eight million, eighty-one thousand, eight hundred forty-two".