64071257 has 2 divisors, whose sum is σ = 64071258. Its totient is φ = 64071256.

The previous prime is 64071251. The next prime is 64071277. The reversal of 64071257 is 75217046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54405376 + 9665881 = 7376^2 + 3109^2 .

It is a cyclic number.

It is not a de Polignac number, because 64071257 - 2⁶ = 64071193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64071251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32035628 + 32035629.

It is an arithmetic number, because the mean of its divisors is an integer number (32035629).

Almost surely, 2^64071257 is an apocalyptic number.

It is an amenable number.

64071257 is a deficient number, since it is larger than the sum of its proper divisors (1).

64071257 is an equidigital number, since it uses as much as digits as its factorization.

64071257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 64071257 is about 8004.4523235509. The cubic root of 64071257 is about 400.1483970223.

The spelling of 64071257 in words is "sixty-four million, seventy-one thousand, two hundred fifty-seven".