71657345 has 16 divisors (see below), whose sum is σ = 89448960. Its totient is φ = 55059264.

The previous prime is 71657323. The next prime is 71657353. The reversal of 71657345 is 54375617.

It is a cyclic number.

It is not a de Polignac number, because 71657345 - 2¹⁶ = 71591809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71657299 and 71657308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12164 + ... + 17066.

It is an arithmetic number, because the mean of its divisors is an integer number (5590560).

Almost surely, 2^71657345 is an apocalyptic number.

It is an amenable number.

71657345 is a deficient number, since it is larger than the sum of its proper divisors (17791615).

71657345 is a wasteful number, since it uses less digits than its factorization.

71657345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024.

The product of its digits is 88200, while the sum is 38.

The square root of 71657345 is about 8465.0661544964. The cubic root of 71657345 is about 415.3557601610.

The spelling of 71657345 in words is "seventy-one million, six hundred fifty-seven thousand, three hundred forty-five".