71284427 has 8 divisors (see below), whose sum is σ = 73013136. Its totient is φ = 69576192.

The previous prime is 71284391. The next prime is 71284439. The reversal of 71284427 is 72448217.

It is a happy number.

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 71284427 - 2¹⁰ = 71283403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71284327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2048 + ... + 12114.

It is an arithmetic number, because the mean of its divisors is an integer number (9126642).

Almost surely, 2^71284427 is an apocalyptic number.

71284427 is a deficient number, since it is larger than the sum of its proper divisors (1728709).

71284427 is a wasteful number, since it uses less digits than its factorization.

71284427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10237.

The product of its digits is 25088, while the sum is 35.

The square root of 71284427 is about 8443.0105412702. The cubic root of 71284427 is about 414.6339773614.

The spelling of 71284427 in words is "seventy-one million, two hundred eighty-four thousand, four hundred twenty-seven".