71387135 has 4 divisors (see below), whose sum is σ = 85664568. Its totient is φ = 57109704.

The previous prime is 71387117. The next prime is 71387143. The reversal of 71387135 is 53178317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53178317 = 907 ⋅58631.

It is a cyclic number.

It is not a de Polignac number, because 71387135 - 2¹⁴ = 71370751 is a prime.

It is a super-2 number, since 2×71387135² = 10192246087016450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71387095 and 71387104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7138709 + ... + 7138718.

It is an arithmetic number, because the mean of its divisors is an integer number (21416142).

Almost surely, 2^71387135 is an apocalyptic number.

71387135 is a deficient number, since it is larger than the sum of its proper divisors (14277433).

71387135 is a wasteful number, since it uses less digits than its factorization.

71387135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14277432.

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

The square root of 71387135 is about 8449.0907794863. The cubic root of 71387135 is about 414.8330193853.

The spelling of 71387135 in words is "seventy-one million, three hundred eighty-seven thousand, one hundred thirty-five".