8142091 has 4 divisors (see below), whose sum is σ = 8184472. Its totient is φ = 8099712.

The previous prime is 8142077. The next prime is 8142103. The reversal of 8142091 is 1902418.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 8142091 - 2¹¹ = 8140043 is a prime.

It is a super-3 number, since 3×8142091³ (a number of 22 digits) contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8142791) 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, 20901 + ... + 21286.

It is an arithmetic number, because the mean of its divisors is an integer number (2046118).

Almost surely, 2^8142091 is an apocalyptic number.

8142091 is a deficient number, since it is larger than the sum of its proper divisors (42381).

8142091 is a wasteful number, since it uses less digits than its factorization.

8142091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42380.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 8142091 is about 2853.4349475676. The cubic root of 8142091 is about 201.1771496670.

The spelling of 8142091 in words is "eight million, one hundred forty-two thousand, ninety-one".