84257249 has 2 divisors, whose sum is σ = 84257250. Its totient is φ = 84257248.

The previous prime is 84257231. The next prime is 84257263. The reversal of 84257249 is 94275248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83905600 + 351649 = 9160^2 + 593^2 .

It is a cyclic number.

It is not a de Polignac number, because 84257249 - 2⁸ = 84256993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84257149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42128624 + 42128625.

It is an arithmetic number, because the mean of its divisors is an integer number (42128625).

Almost surely, 2^84257249 is an apocalyptic number.

It is an amenable number.

84257249 is a deficient number, since it is larger than the sum of its proper divisors (1).

84257249 is an equidigital number, since it uses as much as digits as its factorization.

84257249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 84257249 is about 9179.1747450411. The cubic root of 84257249 is about 438.3985325515.

The spelling of 84257249 in words is "eighty-four million, two hundred fifty-seven thousand, two hundred forty-nine".