71406065 has 8 divisors (see below), whose sum is σ = 86571240. Its totient is φ = 56535552.

The previous prime is 71406043. The next prime is 71406067. The reversal of 71406065 is 56060417.

It can be written as a sum of positive squares in 4 ways, for example, as 13630864 + 57775201 = 3692^2 + 7601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71406065 - 2¹⁸ = 71143921 is a prime.

It is a super-2 number, since 2×71406065² = 10197652237568450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71406067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73130 + ... + 74099.

It is an arithmetic number, because the mean of its divisors is an integer number (10821405).

Almost surely, 2^71406065 is an apocalyptic number.

It is an amenable number.

71406065 is a deficient number, since it is larger than the sum of its proper divisors (15165175).

71406065 is a wasteful number, since it uses less digits than its factorization.

71406065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147331.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 71406065 is about 8450.2109441126. The cubic root of 71406065 is about 414.8696837649.

The spelling of 71406065 in words is "seventy-one million, four hundred six thousand, sixty-five".