71397445 has 8 divisors (see below), whose sum is σ = 97916544. Its totient is φ = 48958224.

The previous prime is 71397439. The next prime is 71397463. The reversal of 71397445 is 54479317.

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

It is not a de Polignac number, because 71397445 - 2¹⁵ = 71364677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71397398 and 71397407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019929 + ... + 1019998.

It is an arithmetic number, because the mean of its divisors is an integer number (12239568).

Almost surely, 2^71397445 is an apocalyptic number.

It is an amenable number.

71397445 is a deficient number, since it is larger than the sum of its proper divisors (26519099).

71397445 is a wasteful number, since it uses less digits than its factorization.

71397445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039939.

The product of its digits is 105840, while the sum is 40.

The square root of 71397445 is about 8449.7008822798. The cubic root of 71397445 is about 414.8529890085.

The spelling of 71397445 in words is "seventy-one million, three hundred ninety-seven thousand, four hundred forty-five".