145507 has 4 divisors (see below), whose sum is σ = 146376. Its totient is φ = 144640.

The previous prime is 145501. The next prime is 145511. The reversal of 145507 is 705541.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 705541 = 29 ⋅24329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145507 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145501) 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, 94 + ... + 547.

It is an arithmetic number, because the mean of its divisors is an integer number (36594).

2¹⁴⁵⁵⁰⁷ is an apocalyptic number.

145507 is a deficient number, since it is larger than the sum of its proper divisors (869).

145507 is an equidigital number, since it uses as much as digits as its factorization.

145507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 145507 is about 381.4537979887. The cubic root of 145507 is about 52.5970389693.

The spelling of 145507 in words is "one hundred forty-five thousand, five hundred seven".