1868971 has 6 divisors (see below), whose sum is σ = 2023980. Its totient is φ = 1725048.

The previous prime is 1868947. The next prime is 1868983. The reversal of 1868971 is 1798681.

It is not a de Polignac number, because 1868971 - 2⁷ = 1868843 is a prime.

It is an Ulam number.

It is a Duffinian number.

1868971 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1868371) 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, 5361 + ... + 5698.

It is an arithmetic number, because the mean of its divisors is an integer number (337330).

2^1868971 is an apocalyptic number.

1868971 is a deficient number, since it is larger than the sum of its proper divisors (155009).

1868971 is a wasteful number, since it uses less digits than its factorization.

1868971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11085 (or 11072 counting only the distinct ones).

The product of its digits is 24192, while the sum is 40.

The square root of 1868971 is about 1367.1031416832. The cubic root of 1868971 is about 123.1782947580.

The spelling of 1868971 in words is "one million, eight hundred sixty-eight thousand, nine hundred seventy-one".