145617 has 4 divisors (see below), whose sum is σ = 194160. Its totient is φ = 97076.

The previous prime is 145603. The next prime is 145633. The reversal of 145617 is 716541.

145617 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

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 145617 - 2⁴ = 145601 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (145637) 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, 24267 + ... + 24272.

It is an arithmetic number, because the mean of its divisors is an integer number (48540).

2¹⁴⁵⁶¹⁷ is an apocalyptic number.

It is an amenable number.

145617 is a deficient number, since it is larger than the sum of its proper divisors (48543).

145617 is an equidigital number, since it uses as much as digits as its factorization.

145617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48542.

The product of its digits is 840, while the sum is 24.

The square root of 145617 is about 381.5979559694. The cubic root of 145617 is about 52.6102896880.

The spelling of 145617 in words is "one hundred forty-five thousand, six hundred seventeen".