145817 has 8 divisors (see below), whose sum is σ = 171456. Its totient is φ = 121392.

The previous prime is 145807. The next prime is 145819. The reversal of 145817 is 718541.

145817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145817 - 2⁶ = 145753 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145817.

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 7 ways as a sum of consecutive naturals, for example, 23 + ... + 540.

It is an arithmetic number, because the mean of its divisors is an integer number (21432).

2¹⁴⁵⁸¹⁷ is an apocalyptic number.

It is an amenable number.

145817 is a deficient number, since it is larger than the sum of its proper divisors (25639).

145817 is an equidigital number, since it uses as much as digits as its factorization.

145817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607.

The product of its digits is 1120, while the sum is 26.

The square root of 145817 is about 381.8599219609. The cubic root of 145817 is about 52.6343648174.

The spelling of 145817 in words is "one hundred forty-five thousand, eight hundred seventeen".