145599 has 4 divisors (see below), whose sum is σ = 194136. Its totient is φ = 97064.

The previous prime is 145589. The next prime is 145601. The reversal of 145599 is 995541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145599 - 2⁷ = 145471 is a prime.

It is an Ulam number.

It is a D-number.

145599 is a lucky number.

It is a plaindrome in base 10 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145549) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 24264 + ... + 24269.

It is an arithmetic number, because the mean of its divisors is an integer number (48534).

2¹⁴⁵⁵⁹⁹ is an apocalyptic number.

145599 is a deficient number, since it is larger than the sum of its proper divisors (48537).

145599 is an equidigital number, since it uses as much as digits as its factorization.

145599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48536.

The product of its digits is 8100, while the sum is 33.

The square root of 145599 is about 381.5743702085. The cubic root of 145599 is about 52.6081218453.

The spelling of 145599 in words is "one hundred forty-five thousand, five hundred ninety-nine".