1886881 has 6 divisors (see below), whose sum is σ = 2004710. Its totient is φ = 1775616.

The previous prime is 1886869. The next prime is 1886887.

1886881 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 3 ways, for example, as 349281 + 1537600 = 591^2 + 1240^2 .

It is not a de Polignac number, because 1886881 - 2⁵ = 1886849 is a prime.

It is a super-2 number, since 2×1886881² = 7120639816322, which contains 22 as substring.

It is a Duffinian number.

1886881 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1886887) 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, 2976 + ... + 3553.

2^1886881 is an apocalyptic number.

It is an amenable number.

1886881 is a deficient number, since it is larger than the sum of its proper divisors (117829).

1886881 is an equidigital number, since it uses as much as digits as its factorization.

1886881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563 (or 6546 counting only the distinct ones).

The product of its digits is 24576, while the sum is 40.

The square root of 1886881 is about 1373.6378707651. The cubic root of 1886881 is about 123.5705094369.

The spelling of 1886881 in words is "one million, eight hundred eighty-six thousand, eight hundred eighty-one".