145171686 has 24 divisors (see below), whose sum is σ = 319139352. Its totient is φ = 43991200.

The previous prime is 145171679. The next prime is 145171703. The reversal of 145171686 is 686171541.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99255 + ... + 100706.

It is an arithmetic number, because the mean of its divisors is an integer number (13297473).

Almost surely, 2^145171686 is an apocalyptic number.

145171686 is an abundant number, since it is smaller than the sum of its proper divisors (173967666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145171686 is a wasteful number, since it uses less digits than its factorization.

145171686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199988 (or 199977 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 145171686 is about 12048.7213429476. The cubic root of 145171686 is about 525.5660543142.

It can be divided in two parts, 1451 and 71686, that added together give a palindrome (73137).

The spelling of 145171686 in words is "one hundred forty-five million, one hundred seventy-one thousand, six hundred eighty-six".