71387141 has 16 divisors (see below), whose sum is σ = 85613568. Its totient is φ = 58233600.

The previous prime is 71387117. The next prime is 71387143. The reversal of 71387141 is 14178317.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 71387141 - 2¹⁸ = 71124997 is a prime.

It is a super-2 number, since 2×71387141² = 10192247800307762, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71387098 and 71387107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71387143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10541 + ... + 15933.

It is an arithmetic number, because the mean of its divisors is an integer number (5350848).

Almost surely, 2^71387141 is an apocalyptic number.

It is an amenable number.

71387141 is a deficient number, since it is larger than the sum of its proper divisors (14226427).

71387141 is a wasteful number, since it uses less digits than its factorization.

71387141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5492.

The product of its digits is 4704, while the sum is 32.

The square root of 71387141 is about 8449.0911345541. The cubic root of 71387141 is about 414.8330310074.

The spelling of 71387141 in words is "seventy-one million, three hundred eighty-seven thousand, one hundred forty-one".