84041257 has 2 divisors, whose sum is σ = 84041258. Its totient is φ = 84041256.

The previous prime is 84041213. The next prime is 84041263. The reversal of 84041257 is 75214048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83247376 + 793881 = 9124^2 + 891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84041257 is a prime.

It is not a weakly prime, because it can be changed into another prime (84041357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42020628 + 42020629.

It is an arithmetic number, because the mean of its divisors is an integer number (42020629).

Almost surely, 2^84041257 is an apocalyptic number.

It is an amenable number.

84041257 is a deficient number, since it is larger than the sum of its proper divisors (1).

84041257 is an equidigital number, since it uses as much as digits as its factorization.

84041257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 84041257 is about 9167.4018674868. The cubic root of 84041257 is about 438.0236029760.

The spelling of 84041257 in words is "eighty-four million, forty-one thousand, two hundred fifty-seven".