2100247 has 2 divisors, whose sum is σ = 2100248. Its totient is φ = 2100246.

The previous prime is 2100239. The next prime is 2100253. The reversal of 2100247 is 7420012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2100247 - 2³ = 2100239 is a prime.

It is a super-2 number, since 2×2100247² = 8822074922018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2100247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050123 + 1050124.

It is an arithmetic number, because the mean of its divisors is an integer number (1050124).

2^2100247 is an apocalyptic number.

2100247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100247 is an equidigital number, since it uses as much as digits as its factorization.

2100247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2100247 is about 1449.2228952097. Note that the first 3 decimals coincide. The cubic root of 2100247 is about 128.0629369853.

Adding to 2100247 its reverse (7420012), we get a palindrome (9520259).

The spelling of 2100247 in words is "two million, one hundred thousand, two hundred forty-seven".