71010257 has 2 divisors, whose sum is σ = 71010258. Its totient is φ = 71010256.

The previous prime is 71010227. The next prime is 71010293. The reversal of 71010257 is 75201017.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35952016 + 35058241 = 5996^2 + 5921^2 .

It is an emirp because it is prime and its reverse (75201017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71010257 - 2⁶ = 71010193 is a prime.

It is a super-3 number, since 3×71010257³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71010227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35505128 + 35505129.

It is an arithmetic number, because the mean of its divisors is an integer number (35505129).

Almost surely, 2^71010257 is an apocalyptic number.

It is an amenable number.

71010257 is a deficient number, since it is larger than the sum of its proper divisors (1).

71010257 is an equidigital number, since it uses as much as digits as its factorization.

71010257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 71010257 is about 8426.7583921696. The cubic root of 71010257 is about 414.1017140609.

The spelling of 71010257 in words is "seventy-one million, ten thousand, two hundred fifty-seven".