145445 has 8 divisors (see below), whose sum is σ = 183840. Its totient is φ = 110160.

The previous prime is 145441. The next prime is 145451. The reversal of 145445 is 544541.

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

It is not a de Polignac number, because 145445 - 2² = 145441 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 145445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671 + ... + 860.

It is an arithmetic number, because the mean of its divisors is an integer number (22980).

2¹⁴⁵⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

145445 is a deficient number, since it is larger than the sum of its proper divisors (38395).

145445 is a wasteful number, since it uses less digits than its factorization.

145445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555.

The product of its digits is 1600, while the sum is 23.

The square root of 145445 is about 381.3725212964. The cubic root of 145445 is about 52.5895674395.

Adding to 145445 its reverse (544541), we get a palindrome (689986).

The spelling of 145445 in words is "one hundred forty-five thousand, four hundred forty-five".