71256671 has 2 divisors, whose sum is σ = 71256672. Its totient is φ = 71256670.

The previous prime is 71256643. The next prime is 71256727. The reversal of 71256671 is 17665217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71256671 - 2⁶ = 71256607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71256071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35628335 + 35628336.

It is an arithmetic number, because the mean of its divisors is an integer number (35628336).

Almost surely, 2^71256671 is an apocalyptic number.

71256671 is a deficient number, since it is larger than the sum of its proper divisors (1).

71256671 is an equidigital number, since it uses as much as digits as its factorization.

71256671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 35.

The square root of 71256671 is about 8441.3666547544. The cubic root of 71256671 is about 414.5801550649.

The spelling of 71256671 in words is "seventy-one million, two hundred fifty-six thousand, six hundred seventy-one".