71247473 has 8 divisors (see below), whose sum is σ = 81815520. Its totient is φ = 61361280.

The previous prime is 71247467. The next prime is 71247481. The reversal of 71247473 is 37474217.

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 71247473 - 2⁴ = 71247457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71247433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170240 + ... + 170657.

It is an arithmetic number, because the mean of its divisors is an integer number (10226940).

Almost surely, 2^71247473 is an apocalyptic number.

It is an amenable number.

71247473 is a deficient number, since it is larger than the sum of its proper divisors (10568047).

71247473 is a wasteful number, since it uses less digits than its factorization.

71247473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340927.

The product of its digits is 32928, while the sum is 35.

The square root of 71247473 is about 8440.8218201784. The cubic root of 71247473 is about 414.5623159288.

The spelling of 71247473 in words is "seventy-one million, two hundred forty-seven thousand, four hundred seventy-three".