2111985 has 12 divisors (see below), whose sum is σ = 3660852. Its totient is φ = 1126368.

The previous prime is 2111971. The next prime is 2112007. The reversal of 2111985 is 5891112.

It can be written as a sum of positive squares in 2 ways, for example, as 345744 + 1766241 = 588^2 + 1329^2 .

It is not a de Polignac number, because 2111985 - 2⁴ = 2111969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23422 + ... + 23511.

It is an arithmetic number, because the mean of its divisors is an integer number (305071).

2^2111985 is an apocalyptic number.

It is an amenable number.

2111985 is a deficient number, since it is larger than the sum of its proper divisors (1548867).

2111985 is a wasteful number, since it uses less digits than its factorization.

2111985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46944 (or 46941 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 2111985 is about 1453.2670091900. The cubic root of 2111985 is about 128.3010694553.

The spelling of 2111985 in words is "two million, one hundred eleven thousand, nine hundred eighty-five".