2138081 has 4 divisors (see below), whose sum is σ = 2332464. Its totient is φ = 1943700.

The previous prime is 2138033. The next prime is 2138093. The reversal of 2138081 is 1808312.

2138081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a de Polignac number, because none of the positive numbers 2^k-2138081 is a prime.

It is a super-3 number, since 3×2138081³ = 29322008633324356323, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97175 + ... + 97196.

It is an arithmetic number, because the mean of its divisors is an integer number (583116).

2^2138081 is an apocalyptic number.

It is an amenable number.

2138081 is a deficient number, since it is larger than the sum of its proper divisors (194383).

2138081 is a wasteful number, since it uses less digits than its factorization.

2138081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194382.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2138081 is about 1462.2178360285. The cubic root of 2138081 is about 128.8273434804.

The spelling of 2138081 in words is "two million, one hundred thirty-eight thousand, eighty-one".