2017881 has 6 divisors (see below), whose sum is σ = 2914730. Its totient is φ = 1345248.

The previous prime is 2017843. The next prime is 2017889. The reversal of 2017881 is 1887102.

It can be written as a sum of positive squares in only one way, i.e., 1550025 + 467856 = 1245^2 + 684^2 .

It is not a de Polignac number, because 2017881 - 2⁶ = 2017817 is a prime.

It is a super-2 number, since 2×2017881² = 8143687460322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2017889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112096 + ... + 112113.

2^2017881 is an apocalyptic number.

It is an amenable number.

2017881 is a deficient number, since it is larger than the sum of its proper divisors (896849).

2017881 is a wasteful number, since it uses less digits than its factorization.

2017881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224215 (or 224212 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 2017881 is about 1420.5213831548. The cubic root of 2017881 is about 126.3664690006.

The spelling of 2017881 in words is "two million, seventeen thousand, eight hundred eighty-one".