7871449 has 2 divisors, whose sum is σ = 7871450. Its totient is φ = 7871448.

The previous prime is 7871443. The next prime is 7871473. The reversal of 7871449 is 9441787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7601049 + 270400 = 2757^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 7871449 - 2⁹ = 7870937 is a prime.

It is not a weakly prime, because it can be changed into another prime (7871443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3935724 + 3935725.

It is an arithmetic number, because the mean of its divisors is an integer number (3935725).

Almost surely, 2^7871449 is an apocalyptic number.

It is an amenable number.

7871449 is a deficient number, since it is larger than the sum of its proper divisors (1).

7871449 is an equidigital number, since it uses as much as digits as its factorization.

7871449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 7871449 is about 2805.6102722937. The cubic root of 7871449 is about 198.9229519155.

The spelling of 7871449 in words is "seven million, eight hundred seventy-one thousand, four hundred forty-nine".