2100985 has 8 divisors (see below), whose sum is σ = 2540160. Its totient is φ = 1668144.

The previous prime is 2100983. The next prime is 2100991. The reversal of 2100985 is 5890012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100985 - 2¹ = 2100983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (317520).

2^2100985 is an apocalyptic number.

It is an amenable number.

2100985 is a deficient number, since it is larger than the sum of its proper divisors (439175).

2100985 is a wasteful number, since it uses less digits than its factorization.

2100985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2100985 is about 1449.4774920640. The cubic root of 2100985 is about 128.0779351228.

Adding to 2100985 its reverse (5890012), we get a palindrome (7990997).

The spelling of 2100985 in words is "two million, one hundred thousand, nine hundred eighty-five".