2120849 has 2 divisors, whose sum is σ = 2120850. Its totient is φ = 2120848.

The previous prime is 2120843. The next prime is 2120851. The reversal of 2120849 is 9480212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2050624 + 70225 = 1432^2 + 265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120849 is a prime.

Together with 2120851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2120843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060424 + 1060425.

It is an arithmetic number, because the mean of its divisors is an integer number (1060425).

2^2120849 is an apocalyptic number.

It is an amenable number.

2120849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120849 is an equidigital number, since it uses as much as digits as its factorization.

2120849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2120849 is about 1456.3134964698. The cubic root of 2120849 is about 128.4803121033.

The spelling of 2120849 in words is "two million, one hundred twenty thousand, eight hundred forty-nine".