145889 has 4 divisors (see below), whose sum is σ = 152256. Its totient is φ = 139524.

The previous prime is 145879. The next prime is 145897. The reversal of 145889 is 988541.

145889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145889 - 2⁸ = 145633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (145819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3149 + ... + 3194.

It is an arithmetic number, because the mean of its divisors is an integer number (38064).

2¹⁴⁵⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

145889 is a deficient number, since it is larger than the sum of its proper divisors (6367).

145889 is an equidigital number, since it uses as much as digits as its factorization.

145889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6366.

The product of its digits is 11520, while the sum is 35.

The square root of 145889 is about 381.9541857344. The cubic root of 145889 is about 52.6430264749.

Adding to 145889 its sum of digits (35), we get a square (145924 = 382²).

The spelling of 145889 in words is "one hundred forty-five thousand, eight hundred eighty-nine".