145663 has 4 divisors (see below), whose sum is σ = 166480. Its totient is φ = 124848.

The previous prime is 145661. The next prime is 145679. The reversal of 145663 is 366541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366541 = 7 ⋅52363.

It is a cyclic number.

It is not a de Polignac number, because 145663 - 2¹ = 145661 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145661) 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, 10398 + ... + 10411.

It is an arithmetic number, because the mean of its divisors is an integer number (41620).

2¹⁴⁵⁶⁶³ is an apocalyptic number.

145663 is a deficient number, since it is larger than the sum of its proper divisors (20817).

145663 is an equidigital number, since it uses as much as digits as its factorization.

145663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20816.

The product of its digits is 2160, while the sum is 25.

The square root of 145663 is about 381.6582240697. The cubic root of 145663 is about 52.6158289188.

It can be divided in two parts, 145 and 663, that added together give a palindrome (808).

The spelling of 145663 in words is "one hundred forty-five thousand, six hundred sixty-three".