2981881 has 8 divisors (see below), whose sum is σ = 3556224. Its totient is φ = 2444640.

The previous prime is 2981873. The next prime is 2981887. The reversal of 2981881 is 1881892.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2981881 - 2³ = 2981873 is a prime.

It is a super-2 number, since 2×2981881² = 17783228596322, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 9 and base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2981881.

It is not an unprimeable number, because it can be changed into a prime (2981887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9100 + ... + 9421.

It is an arithmetic number, because the mean of its divisors is an integer number (444528).

2^2981881 is an apocalyptic number.

It is an amenable number.

2981881 is a deficient number, since it is larger than the sum of its proper divisors (574343).

2981881 is a wasteful number, since it uses less digits than its factorization.

2981881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18551.

The product of its digits is 9216, while the sum is 37.

The square root of 2981881 is about 1726.8123812389. The cubic root of 2981881 is about 143.9340136200.

The spelling of 2981881 in words is "two million, nine hundred eighty-one thousand, eight hundred eighty-one".