64458257 has 2 divisors, whose sum is σ = 64458258. Its totient is φ = 64458256.

The previous prime is 64458227. The next prime is 64458287. The reversal of 64458257 is 75285446.

It is a balanced prime because it is at equal distance from previous prime (64458227) and next prime (64458287).

It can be written as a sum of positive squares in only one way, i.e., 63856081 + 602176 = 7991^2 + 776^2 .

It is a cyclic number.

It is not a de Polignac number, because 64458257 - 2⁶ = 64458193 is a prime.

It is not a weakly prime, because it can be changed into another prime (64458227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32229128 + 32229129.

It is an arithmetic number, because the mean of its divisors is an integer number (32229129).

Almost surely, 2^64458257 is an apocalyptic number.

It is an amenable number.

64458257 is a deficient number, since it is larger than the sum of its proper divisors (1).

64458257 is an equidigital number, since it uses as much as digits as its factorization.

64458257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 41.

The square root of 64458257 is about 8028.5899758301. The cubic root of 64458257 is about 400.9524324644.

The spelling of 64458257 in words is "sixty-four million, four hundred fifty-eight thousand, two hundred fifty-seven".