71267139 has 18 divisors (see below), whose sum is σ = 104957580. Its totient is φ = 46598448.

The previous prime is 71267137. The next prime is 71267227. The reversal of 71267139 is 93176217.

It is a happy number.

It is not a de Polignac number, because 71267139 - 2¹ = 71267137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71267137) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23872 + ... + 26690.

Almost surely, 2^71267139 is an apocalyptic number.

71267139 is a deficient number, since it is larger than the sum of its proper divisors (33690441).

71267139 is a wasteful number, since it uses less digits than its factorization.

71267139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931 (or 2875 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 71267139 is about 8441.9866737635. The cubic root of 71267139 is about 414.6004554452.

The spelling of 71267139 in words is "seventy-one million, two hundred sixty-seven thousand, one hundred thirty-nine".