145998 has 12 divisors (see below), whose sum is σ = 316368. Its totient is φ = 48660.

The previous prime is 145991. The next prime is 146009. The reversal of 145998 is 899541.

145998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145991) by changing a digit.

145998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4038 + ... + 4073.

It is an arithmetic number, because the mean of its divisors is an integer number (26364).

2¹⁴⁵⁹⁹⁸ is an apocalyptic number.

145998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

145998 is an abundant number, since it is smaller than the sum of its proper divisors (170370).

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

145998 is a wasteful number, since it uses less digits than its factorization.

145998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8119 (or 8116 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 145998 is about 382.0968463623. The cubic root of 145998 is about 52.6561338406.

The spelling of 145998 in words is "one hundred forty-five thousand, nine hundred ninety-eight".