2175449 has 2 divisors, whose sum is σ = 2175450. Its totient is φ = 2175448.

The previous prime is 2175431. The next prime is 2175451. The reversal of 2175449 is 9445712.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1729225 + 446224 = 1315^2 + 668^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2175449 is a prime.

Together with 2175451, 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 (2175469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1087724 + 1087725.

It is an arithmetic number, because the mean of its divisors is an integer number (1087725).

2^2175449 is an apocalyptic number.

It is an amenable number.

2175449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2175449 is an equidigital number, since it uses as much as digits as its factorization.

2175449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 2175449 is about 1474.9403377764. The cubic root of 2175449 is about 129.5735334678.

The spelling of 2175449 in words is "two million, one hundred seventy-five thousand, four hundred forty-nine".