2801881 has 4 divisors (see below), whose sum is σ = 2805264. Its totient is φ = 2798500.

The previous prime is 2801863. The next prime is 2801891. The reversal of 2801881 is 1881082.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2801881 - 2⁹ = 2801369 is a prime.

It is a super-2 number, since 2×2801881² = 15701074276322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2801801) 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, 486 + ... + 2416.

It is an arithmetic number, because the mean of its divisors is an integer number (701316).

2^2801881 is an apocalyptic number.

It is an amenable number.

2801881 is a deficient number, since it is larger than the sum of its proper divisors (3383).

2801881 is a wasteful number, since it uses less digits than its factorization.

2801881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 2801881 is about 1673.8820149580. The cubic root of 2801881 is about 140.9775294071.

The spelling of 2801881 in words is "two million, eight hundred one thousand, eight hundred eighty-one".