145813 has 4 divisors (see below), whose sum is σ = 149248. Its totient is φ = 142380.

The previous prime is 145807. The next prime is 145819. The reversal of 145813 is 318541.

145813 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: 318541 = 59 ⋅5399.

It is an interprime number because it is at equal distance from previous prime (145807) and next prime (145819).

It is a cyclic number.

It is not a de Polignac number, because 145813 - 2¹⁷ = 14741 is a prime.

It is a super-2 number, since 2×145813² = 42522861938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 1653 + ... + 1738.

It is an arithmetic number, because the mean of its divisors is an integer number (37312).

2¹⁴⁵⁸¹³ is an apocalyptic number.

It is an amenable number.

145813 is a deficient number, since it is larger than the sum of its proper divisors (3435).

145813 is an equidigital number, since it uses as much as digits as its factorization.

145813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434.

The product of its digits is 480, while the sum is 22.

The square root of 145813 is about 381.8546844023. The cubic root of 145813 is about 52.6338835307.

The spelling of 145813 in words is "one hundred forty-five thousand, eight hundred thirteen".