8145881 has 4 divisors (see below), whose sum is σ = 8163792. Its totient is φ = 8127972.

The previous prime is 8145871. The next prime is 8145911. The reversal of 8145881 is 1885418.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1885418 = 2 ⋅942709.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8145881 is a prime.

It is a super-2 number, since 2×8145881² = 132710754532322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8145811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8255 + ... + 9188.

It is an arithmetic number, because the mean of its divisors is an integer number (2040948).

Almost surely, 2^8145881 is an apocalyptic number.

It is an amenable number.

8145881 is a deficient number, since it is larger than the sum of its proper divisors (17911).

8145881 is a wasteful number, since it uses less digits than its factorization.

8145881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17910.

The product of its digits is 10240, while the sum is 35.

The square root of 8145881 is about 2854.0989821658. The cubic root of 8145881 is about 201.2083596320.

The spelling of 8145881 in words is "eight million, one hundred forty-five thousand, eight hundred eighty-one".