145717685 has 8 divisors (see below), whose sum is σ = 175016376. Its totient is φ = 116470720.

The previous prime is 145717661. The next prime is 145717703. The reversal of 145717685 is 586717541.

It can be written as a sum of positive squares in 4 ways, for example, as 69522244 + 76195441 = 8338^2 + 8729^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-145717685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 6434 + ... + 18243.

It is an arithmetic number, because the mean of its divisors is an integer number (21877047).

Almost surely, 2^145717685 is an apocalyptic number.

It is an amenable number.

145717685 is a deficient number, since it is larger than the sum of its proper divisors (29298691).

145717685 is a wasteful number, since it uses less digits than its factorization.

145717685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25863.

The product of its digits is 235200, while the sum is 44.

The square root of 145717685 is about 12071.3580429047. The cubic root of 145717685 is about 526.2241246354.

The spelling of 145717685 in words is "one hundred forty-five million, seven hundred seventeen thousand, six hundred eighty-five".