2100807 has 6 divisors (see below), whose sum is σ = 3034512. Its totient is φ = 1400532.

The previous prime is 2100803. The next prime is 2100821. The reversal of 2100807 is 7080012.

It is not a de Polignac number, because 2100807 - 2² = 2100803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100803) 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, 116703 + ... + 116720.

It is an arithmetic number, because the mean of its divisors is an integer number (505752).

2^2100807 is an apocalyptic number.

2100807 is a deficient number, since it is larger than the sum of its proper divisors (933705).

2100807 is a wasteful number, since it uses less digits than its factorization.

2100807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233429 (or 233426 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 2100807 is about 1449.4160893270. The cubic root of 2100807 is about 128.0743180073.

Adding to 2100807 its reverse (7080012), we get a palindrome (9180819).

The spelling of 2100807 in words is "two million, one hundred thousand, eight hundred seven".