71389451 has 8 divisors (see below), whose sum is σ = 82003680. Its totient is φ = 60879168.

The previous prime is 71389433. The next prime is 71389471. The reversal of 71389451 is 15498317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71389451 - 2¹⁸ = 71127307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71389411) 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, 24506 + ... + 27263.

It is an arithmetic number, because the mean of its divisors is an integer number (10250460).

Almost surely, 2^71389451 is an apocalyptic number.

71389451 is a deficient number, since it is larger than the sum of its proper divisors (10614229).

71389451 is a wasteful number, since it uses less digits than its factorization.

71389451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51973.

The product of its digits is 30240, while the sum is 38.

The square root of 71389451 is about 8449.2278345420. The cubic root of 71389451 is about 414.8375054545.

The spelling of 71389451 in words is "seventy-one million, three hundred eighty-nine thousand, four hundred fifty-one".