145313 has 4 divisors (see below), whose sum is σ = 166080. Its totient is φ = 124548.

The previous prime is 145307. The next prime is 145349. The reversal of 145313 is 313541.

145313 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, and also an emirpimes, since its reverse is a distinct semiprime: 313541 = 241 ⋅1301.

It is a cyclic number.

It is not a de Polignac number, because 145313 - 2¹⁰ = 144289 is a prime.

It is a super-2 number, since 2×145313² = 42231735938, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 145291 and 145300.

It is not an unprimeable number, because it can be changed into a prime (145303) 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, 10373 + ... + 10386.

It is an arithmetic number, because the mean of its divisors is an integer number (41520).

2¹⁴⁵³¹³ is an apocalyptic number.

It is an amenable number.

145313 is a deficient number, since it is larger than the sum of its proper divisors (20767).

145313 is an equidigital number, since it uses as much as digits as its factorization.

145313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20766.

The product of its digits is 180, while the sum is 17.

The square root of 145313 is about 381.1994228747. The cubic root of 145313 is about 52.5736532359.

Adding to 145313 its reverse (313541), we get a palindrome (458854).

The spelling of 145313 in words is "one hundred forty-five thousand, three hundred thirteen".