71266457 has 2 divisors, whose sum is σ = 71266458. Its totient is φ = 71266456.

The previous prime is 71266411. The next prime is 71266529. The reversal of 71266457 is 75466217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70375321 + 891136 = 8389^2 + 944^2 .

It is a cyclic number.

It is not a de Polignac number, because 71266457 - 2¹² = 71262361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71266457.

It is not a weakly prime, because it can be changed into another prime (71266157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35633228 + 35633229.

It is an arithmetic number, because the mean of its divisors is an integer number (35633229).

Almost surely, 2^71266457 is an apocalyptic number.

It is an amenable number.

71266457 is a deficient number, since it is larger than the sum of its proper divisors (1).

71266457 is an equidigital number, since it uses as much as digits as its factorization.

71266457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 71266457 is about 8441.9462803313. The cubic root of 71266457 is about 414.5991329170.

The spelling of 71266457 in words is "seventy-one million, two hundred sixty-six thousand, four hundred fifty-seven".