145985 has 16 divisors (see below), whose sum is σ = 206976. Its totient is φ = 96768.

The previous prime is 145969. The next prime is 145987. The reversal of 145985 is 589541.

It is not a de Polignac number, because 145985 - 2⁴ = 145969 is a prime.

It is a super-3 number, since 3×145985³ = 9333530635639875, which contains 333 as substring.

It is an Ulam number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145985.

It is not an unprimeable number, because it can be changed into a prime (145987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1457 + ... + 1553.

It is an arithmetic number, because the mean of its divisors is an integer number (12936).

2¹⁴⁵⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

145985 is a deficient number, since it is larger than the sum of its proper divisors (60991).

145985 is an equidigital number, since it uses as much as digits as its factorization.

145985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152.

The product of its digits is 7200, while the sum is 32.

The square root of 145985 is about 382.0798345896. The cubic root of 145985 is about 52.6545709195.

Subtracting 145985 from its reverse (589541), we obtain a square (443556 = 666²).

The spelling of 145985 in words is "one hundred forty-five thousand, nine hundred eighty-five".