8401081 has 4 divisors (see below), whose sum is σ = 9047332. Its totient is φ = 7754832.

The previous prime is 8401061. The next prime is 8401087. The reversal of 8401081 is 1801048.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4239481 + 4161600 = 2059^2 + 2040^2 .

It is a cyclic number.

It is not a de Polignac number, because 8401081 - 2⁹ = 8400569 is a prime.

It is a super-2 number, since 2×8401081² = 141156323937122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8401087) 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, 323106 + ... + 323131.

It is an arithmetic number, because the mean of its divisors is an integer number (2261833).

Almost surely, 2^8401081 is an apocalyptic number.

It is an amenable number.

8401081 is a deficient number, since it is larger than the sum of its proper divisors (646251).

8401081 is a wasteful number, since it uses less digits than its factorization.

8401081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646250.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 8401081 is about 2898.4618334558. The cubic root of 8401081 is about 203.2879910243.

The spelling of 8401081 in words is "eight million, four hundred one thousand, eighty-one".